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Well, Just back from the range. I went to zero my new 270 win with the Schmidt&Bender Zenith scope.  The ammo was Winchester 130 grains. I think the boxes are a little old, maybe 26 or 27 years old ?? (yes, we have to live with these things when living in third world countries)Maybe they are not so old but those 81 and 82 look like the production years..    The first three shots were always ok but the 4th and 5th were always a little bit low. The barrel was very hot after each five shots session...maybe that was the reason of the 4th and 5th shots going low ???  I shot the first shots without using the red dot of the scope.  After turning the red dot ON it was MUCH easier to hit the target shooting very quicky but the 4th and 5th shots went low again....   Then I shot two more (after coolong the barrel) and they were ok again.  So, it seems I have to hit my game with the first two or three shots...   Honestly, using a red dot reticle makes things MUCH easier...  Range distance 100 yards. L | ||
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I will ask again just in case my question was not clear. Is this normal ? It's something I can do to avoid that after three shots the groups start opening ? Is the cause of this the barrel heating too much ? Thanks L
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I can not imagine a hunting situation that I would be able to get off a five shot rapid fire string on line targets. If I did I doubt they would still be standing at the same location during the event. With that said three shots maybe before live targets had not acquired suitable cover. That would allow a little time to scan the cover for targets of oppurtuinity and let the barrel cool for a few minutes to help bring POI back with the others. I imagine you have a pressure point efffecting 4 and 5 shot as that barrell heats up. I wouldn't be to worried unless you have shots tha allow you tp tke five quick shots, then just hold high for 4th and 5th shot. Nice looking gun and 3 shot group BTW Founding member of the 7MM STW club Member of the Texas Cull Hunters Association | |||
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could be many things... the barrel may not be evenly floated and therefore as it heats up it is hitting something in the channel... even if it set up with a pressure pad near the forend tip there may be uneven clearance in other areas... I would leave it as is...if it ain't done in three, the red stag wins Mike Legistine actu quod 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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Try to allow the barrel to fully cool between all 5 shots, and what happens? I would also be sure not to allow a cartridge to "cook" or preheat in the chamber before firing it. So if there is more than say 10 secs from chambering to firing... eject and put a cooler cartridge in. Here in the desert at this time of the year I am freezing my ammunition before going to the rnage and keeping it in a cooler before shooting, it helps. Lastly, if you have reloading dies for the cartridge, try to seat the bullets .005" deeper to break the seal so to speak of age. Good luck good shooting, and nice rifle!  Member NRA, SCI- Life #358 28+ years now! DRSS, double owner-shooter since 1983, O/U .30-06 Browning Continental set. | |||
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Thanks gentlemen. I am more a hunter than a shooter so I have no problem with the groups opening a little bit but it's nice to see all shots inside the target..it's like a therapy  Usually what I can't do with the first two shots I can't solve it with the next ten !!! The first shot is everything down here, the second one the animal is running at full speed and nearly allways there is not a third oportunity... I am going to start shooting at 300 yards targets to see what happens. I have been shooting bigger calibers all my life so the 270 it´s a pleasure to shoot at the bench, the bad thing is how quickly the ammo supplies goes down.. I will keep you updated with future tests. Hey Mike, next time you decide to travel south bring a bunch of 9,3 bullets...250 grainers but not Barnes, they are to tough for our game Thanks again. L | |||
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I happen to agree with Mike. I'd wait until the barrel has cooled down to ambient temperature before I fired the next round. From what I can tell from the photos, things aren't too bad but I think I'd want to look at the bedding if I really wanted the group to tighten up. Good Luck. Bear in Fairbanks Unless you're the lead dog, the scenery never changes. I never thought that I'd live to see a President worse than Jimmy Carter. Well, I have. Gun control means using two hands. | |||
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WoW-thats alot of scope you got there, how well does that rig handle&balance? | |||
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If you're a hunter rather than someone that angst about an eighth of an inch of group size, I wouldn't worry about it. There's been a whole bunch of game collected with rifles that group no better than yours. Your rifle is very consistant with it's first three shots. Just make sure you make a good shot amongst the first three.  | |||
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Lorenzo, I have a .270 lightweight (featherweight), and I see the exact same results as you've had. Like you, I've come to the conclusion that my 2nd and 3rd shots are best reserved for the 2nd and 3rd deer!  Best of luck, friar Our liberties we prize, and our rights we will maintain. | |||
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