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one of us |
With any radical shift in point of impact the first thing to suspect is the scope, or its mounts. Second thing is a warping stock. Don't know your firearm but even plastic and fiberglass stocks will warp and cause a problem like you have. Wood is particularly bad as most wood in factory rifles isn't properly sealed to start with. Humidity changes will affect it greatly. | |||
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<BMG> |
monyhunter, I was shooting my 32" barreled 45-70 at the range yesterday and did some tests that you might find interesting. I shot my known load at 100yds while resting the forearm on the bags and holding the gun only with my shooting hand. Four shot groups 1.5" (405gr cast bullets, Fed GM210M, and 37gr IMR 3031) is normal with this load/gun and all was well. I then rested my hand under the forearm and gripped the rifle with both my hands and fired another four shots, well... 3" low and to the right was where they went in a 4" group. Moral of the story: Check your grip. Different grips produce different POI. Hope this helps. | ||
<Mike M> |
Could well be the scope. But I would double check the seating depth. The Barnes bullets usually like to be seated about .05 off the lands. If they are seated against the lands pressure can go up significantly and accuracy will go straight to Hell. | ||
one of us |
I suspect that big belled scope took a whack!! that why I like stright tube 20MM scopes like the 1.5x5 Leupold on hunting rifles. they don't stick out far beyond the front ring (1/2") and believe me that makes a difference...Took me a long time to figure that out... Next could be the stock warped. ------------------ | |||
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one of us |
With the one and only Tasco scope I have used much, just changing the power from 3 to 9 power would cause the POI to change about that much. Second guess would be the mounts, a loose screw or a broken screw. Third, a loose action screw. Any one of these, or a combination, could cause such a shift in POI. | |||
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<whales> |
When you were shooting was the barrel or the stock on the sand bags. It does make a differance | ||
<monyhunter> |
Bob338 = I don't think it could be the stock. Well in fact I did take the stock off the last cleaning round to get the dust off. Maybe that is it. BMG = I was gripping the rifle the same way I always do to the best of my recollection. I do agree that any variation could cause the problems I was having. I will keep this in mind this weekend when I test some things out. Mike M = I could not be the seating depth as the three shot were from the exact same loadings as I had used to sight the gun in with. They were also the same "lot" of loads I used to take my two whitetail. I don't know how far off the lands the bullets are seated, but I take them about 1/2 turn off the lands. Not exact science, but they "did" shoot straight. Ray = I think it may be the scope. I have had this scope for about 7 years, so it may just have given up. To test this theory I am going to load up some 140 grn Ballistic Tips and shoot those this weekend. I have never had anything but stellar groups with the ballistic tips. My thought is that if the gun/scope can still shoot a nice group with the noslers, then it must have been something other that the scope. JMac = Yes I think the scope is "lower" quality. I have been happy with it so far, but if it really is the scope I will be "upgrading" from here on out. whales = see my response to BMG.
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one of us |
What was the temperature readings before and after the problem... | |||
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Administrator |
monyhunter, I had a similar experience to yours by just changing bullets. I have been shooting Barnes X 300 grain bullets in my 375/404 for a number of years. They shoot very accurately in my rifle. Earlier this year, I was loading some ammo for our hunt in Zimbabwe, and noticed that Barnes have changed the design of thier X bullets. I used teh same components as with the old style bullets, but found the new ones would shoot about 8 inches to the left!? I could not beleive it at first, so loaded a couple of loads with the old style bullets. Sure enough, those went excatly as they should. I re-adjusted my scope and left it at that. The new bullets worked just as great as the old ones. ------------------ www.accuratereloading.com | |||
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<Boyd Heaton> |
My 300 Ultra on a clean barrel alway's spit's the first one about 4 inches high and 2 inches to the right and takes about 5 shot's to settle down. ------------------ | ||
one of us |
My Tikka also reacts pretty interestingly if you change the torque on the action bolts. Wouldn't be surprised if taking the gun out of the stock wasn't the culprit (but I still vote for the scope!). HTH, Dutch. | |||
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<Reloader66> |
You stated you took the rifle apart. That fact is certain to change POI. You can never get the same tension on the actions screws after taking the rifle apart. Always recheck your POI after doing any work on any rifle. This kinda like Paul Harvey and now the rest of the story. Rifles are like fine wine and beautiful women every day they change just a little and you must keep up with those changes. Tasco scopes are from the best but in this case I would bet your rifle being taken apart and put back together is the reason for the POI change. Before the hunt adjust the POI where you want it and leave it alone until the hunt is over. Check POI when you get to camp and you should have no trouble finding the kill zone. | ||
<Don Krakenberger> |
Took my BAR 30-06 out of the gun safe and checked it for wis whitetail season. It was dialed in 2 yrs ago perfect. I was 1.5 ft high and left of my target---couldn't figure it out---NOW THANKS TO YOUR GUYS I HAVE THE ANSWER--now i remember I took off my forarm and cleaned up the sliding mechanism 2 yrs ago after the hunt!!!---Thanks for "jogging" my memory. I gotta quit drinking beer! | ||
<Link> |
Hi I am no expert on guns. However when I assemble anything I try to go with a recommended torque. I use a inch of ft. lb. # torque wrench. This goes for the assembly of my guns also. Can't hurt? lol Don | ||
<TomJ> |
Was the bore clean? I noticed with my 30-06 that the first shot from a cold, clean bore was a little high and right. I'd check the scope too. After 20 years experience, I no longer put any faith in Tasco, Simmons, Bushnells or other inexpensive scopes. Heck, you can buy a Leupold VariX II 3x9 for $180 at the discount stores now or a Nikon 3x9 for about the same money. | ||
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