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just curious when you bore sight the old fashion way as in put a dot on the wall say 15 ft away that you can see when looking through the bore an you then align the reticle... do you basically align the reticle 1.5 inches above the dot (assuming that the centerline of the scope is 1.5 inches above the bore) because at such a close distance the line of departure is not going to close on the line of sight by very much? Mike Legistine actu? Quid scripsi? Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue.  What I have learned on AR, since 2001: 1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken. 2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps. 3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges. 4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down. 5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine. 6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle. 7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions. 8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA. 9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not. 10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact. 11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores. 12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence. 13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances. | ||
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Mike, don't make it too complicated, it's just a bore sight. Place the dot on a target at 100 yards, pull the bolt and set your cross hairs 1.5 inches above where you think the bullet might hit. Seriously, place your cross hairs in the center of the dot and go to the range. You gotta go there anyway unless you will be hunting at the zoo where the shots might be 15 feet... _______________________________________________________________________________ This is my rifle, there are many like it but this one is mine. My rifle is my best friend, it is my life. | |||
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Guy, If I make it easy...I won't screw things up...if I don't screw things up...how will you make money...  Mike Legistine actu? Quid scripsi? Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue. What I have learned on AR, since 2001: 1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken. 2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps. 3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges. 4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down. 5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine. 6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle. 7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions. 8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA. 9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not. 10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact. 11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores. 12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence. 13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances. | |||
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 Always thought I was bore sighting the old fashion way but it always was from 40 to 100 yds.  Never looked at bore sighting as more than a rough method to get on paper.  I'm not being sarcastic but I don't think most of my scopes would offer better than a blur at 15 feet.  rogerOld age is a high price to pay for maturity!!! Some never pay and some pay and never reap the reward. Wisdom comes with age! Sometimes age comes alone.. | |||
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Believe me pal, there are others just like you out there. I will be just fine.  _______________________________________________________________________________ This is my rifle, there are many like it but this one is mine. My rifle is my best friend, it is my life. | |||
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Mike For most modern cartridges you want the line of bore and line of sight to cross at approx 25 yards for a scope and 12 yards for iron sights. Use the Math and Trig skills that you learned in high school (you were paying attention weren't you ?) and figure it out. Or, do like Westpac says. Ray Arizona Mountains | |||
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Fifteen feet is too close. For bore sighting you will need about 15 meters/yds - set the reticle dead on the dot and you will be surprized at how close that will actually be. My 303-25 will be withing 2 MOA this way at 100. This was with a loose scope base.  But, I had predetermined what the bore sighting cross-over distance was before I changed scopes. Still, 15yds or so gets you pretty close. Regards 303Guy | |||
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I was not paying attention in high school trig class... I was otherwise pre-occupied in high school trig class... Mike Legistine actu? Quid scripsi? Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue. What I have learned on AR, since 2001: 1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken. 2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps. 3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges. 4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down. 5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine. 6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle. 7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions. 8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA. 9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not. 10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact. 11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores. 12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence. 13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances. | |||
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Mike 15 feet is 5 yards. So 1.5" x 5/25 = .3" 1.5" - .3 = 1.2". So, if your scope is 1.5" above the bore (it probably isn't) you need to set the crosshair 1.2" low at 15 feet. Or, do as Westpac says.   Ray Arizona Mountains | |||
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That's exactly why I dropped out of medical school. Too much math! _______________________________________________________________________________ This is my rifle, there are many like it but this one is mine. My rifle is my best friend, it is my life. | |||
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or I can always just get it lined up let to right...then bottom out the vertical in one direction...count the number of turns to bottom out in the other direct and then go to the mid point... fire one shot at the 25 yard line and go from there... but gosh that would be taking Guy's advice...and why would I want to do that... Mike Legistine actu? Quid scripsi? Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue. What I have learned on AR, since 2001: 1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken. 2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps. 3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges. 4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down. 5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine. 6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle. 7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions. 8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA. 9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not. 10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact. 11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores. 12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence. 13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances. | |||
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Margaret H. sat next to me in trig class. Didn't care a thing about trig, and unfortunately, didn't learn anything else either. | |||
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How did Margaret turn out??? I've met a few of the gals from my high school days and they turned out ugly and mean. That's what they get for dissing me. ray Arizona Mountains | |||
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If you are sighted in at 100 yards, the path of your bullet will cross the sight line of the scope around 30 to 35 yards. I walk out and put a bright colored object at 30 and line the scope up with it while the bore is also on it. It is good enough to get you on the paper and that is all bore sighting is supposed to do. Don't get too technical about it. | |||
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Mike- I like to boresight a rifle at night. set the rifle up in a vice, bolt out, and get a street light (needs to be at 80-100 yards) centered in the bore. You can tell when it is centered because whole tube will "brighten up". (I know you keep your bore shiny )Adjust the crosshairs to center on the light. One is usually within 2-3 inches of zero with this method. It is probably best to do this through a window to keep the neighbors from being agitated  Bob | |||
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I have been bore sighting for years to get on the paper when I swap scope at the range. It is allot easier to find the target with a 458 than a 17. | |||
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I most often do it the old fasion way, It would work great with your small bore cartridges. I do it in the basment, probably about 50 ft, and I go 1.5 high. Most often at the range , I am close to the bull at 25 yards, make an adjustment or 2,then fire 2nd round at 50 , make another adjustment , then i am on at 100 in 2 shots. But when you get to bigger bore stuff it gets a little less efective. Be advised am no gunsmith but this works fine for me. But if you have a good smith in your town, and have spent as much money with him as I have mine, he darn well should bore sight your rifle as a gesture of apreciation. Some might not but mine will. Of course I have givin him old parts I don't need like the trigger from my JC higgins after I put in a timney, and a set of S&W revolver sights. But 30 cal and smaller the old fasiond way works as good as a tool , as far as i am concerned. ...tj3006 freedom1st | |||
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after tip burns built my .416 taylor, i scoped it with a redfield 2-7x20... boresighted it by pulling the bolt, looking at a orange clay pigeon about 15 yds away.... put the crosshhairs on the pigeon... while at the big bore shoot in march '08, rusty asked to shoot my gun... i explained that it was only boresighted, he shot anyway... and busted the pigeon... good enough for me..... go big or go home ........ DSC-- Life Member NRA--Life member DRSS--9.3x74 r Chapuis | |||
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Me too.....I use 25/50 yrds to get on the paper ________________________________________________ Maker of The Frankenstud Sling Keeper Proudly made in the USA Acepting all forms of payment | |||
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Bore sighting can get you on paper at some amazing distances. I shoot 1000 yard Benchrest and me and my buddies often boresight at that yardage. Line up the bore on a target number board way up on the berm, put the crosshairs on a clay bird or big rock on the backstop, and you'd be surprised how close your first shot will be. All that's needed is an idea of the bullet trajectory and that is easy to get from any of the exterior ballistics programs. So simple even a caveman can do it. ray Arizona Mountains | |||
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I have heard of people using a sized empty and looking through the flash hole in the primer pocket. Never done it myself. I just look down the bore at 50 and line it up as best i can. | |||
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I jsut had a guy in the shop today, Sunday to say the least, and I mounted a scope for him. I have a Bushnell collimator and one of the magnetic Leupold's. Set it up for the Bushnel and put the Leupold on and they were both different. Went out to the garage, opened the door, set the gunin the front rest and bore sighted it in on the cross beams on the neighbor's window. That usually works for me. I hope the neighbors don't catch me doing it, I think they would fread out. They are immigrants from Ghana. Jim Kobe 10841 Oxborough Ave So Bloomington MN 55437 952.884.6031 Professional member American Custom Gunmakers Guild | |||
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well...all those things are well and good but I got about 15 ft to work with in the garage So here is what I am doing... Measuring the centerline of my scope above the bore = 1.4 inches. Entering the known BC and muzzle velocity into a ballistics calculator zeroed at 100 yds and telling it to give me 5 yard increments. Says my bullet is 1.3 inches low at 5 yards. I am going to assume 0 drop from line of departure for such a short distance. Put sticky dot on the wall and center it in the bore. Put another dot on the wall 1.3 inches high and adjust the reticule to be centered on that upper dot Mike Legistine actu? Quid scripsi? Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue. What I have learned on AR, since 2001: 1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken. 2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps. 3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges. 4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down. 5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine. 6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle. 7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions. 8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA. 9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not. 10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact. 11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores. 12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence. 13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances. | |||
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Open the garage door, Mike. rogerOld age is a high price to pay for maturity!!! Some never pay and some pay and never reap the reward. Wisdom comes with age! Sometimes age comes alone.. | |||
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Mike, You have to go to the range sometime...... don't you? I always just boresight at 100yards when I go to the range. | |||
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Nowadays I do it at the 200 yard range -- I do all my shooting at the 200 yard range now instead of the 100 yard one. If you put a rifle in the rest, pull the bolt and look carefully down the barrel until you have a bull-dot centered in the barrel, and then move the crosshairs of the scope until they are exactly on the bull-dot, you should get an alignment that will get you within 12 inches of the bull with your first shot. Then you can adjust the scope using the formula that whatever change in the reticle gives you 1/4 inch at 100 yards will give you 1/2 inch at 200 yards. With this method I can usually get what I want with three shots. "How's that whole 'hopey-changey' thing working out for ya?" | |||
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Mike at 15', your setup will be an x,y of ducttape, TRY to make it 180deg intersection and a claybird in the middle, center the bore on the bird, scope on the top edge of the clay bird. it'll hit paper at 25 opinions vary band of bubbas and STC hunting Club Information on Ammoguide about the416AR, 458AR, 470AR, 500AR What is an AR round? Case Drawings 416-458-470AR and 500AR. 476AR, http://www.weaponsmith.com | |||
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Don't get this measuring & ballistics calculation. You are making it way too complicated. LE 270 has it right. Just set your rifle up in solid rest, remove bolt, center bore on target at 25 yds, adjust scope reticle (or open sights) to center of target- and shoot. This should put you center or near center on target. Then move out to 100 yds and make appropriate adjustments of reticle to desired point of impact. For .270 class velocities I adjust to impact 3" to 3.5" high @ 100 yds. That will allow for a dead on hold out to 300 yds. | |||
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Guys...it is just "theoretical question" related to trying to accomplish something in the garage. Hell, I don't even need to bore sight at all. My range has a 25 yd line. I can simply peg the elevation and windage adjustments in one direction, then count clicks as I peg them in the other direction, and then bring them back by 1/2. That will put me on the paper at 25 yards...at least has for the last 1/2 dozen scopes I have put on rifles. Mike Legistine actu? Quid scripsi? Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue. What I have learned on AR, since 2001: 1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken. 2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps. 3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges. 4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down. 5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine. 6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle. 7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions. 8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA. 9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not. 10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact. 11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores. 12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence. 13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances. | |||
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