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Semi autos worse accuracy is 1st shot.

This is a discussion on Semi autos worse accuracy is 1st shot. within the Pistols & Revolvers forums, part of the Pistol & Revolver Forum category; I find this topic interesting. Some articles say that the first shot is less accurate than the rest of the mag. I think this has ...


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Old October 6th, 2019, 12:21 PM   #1
 
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Semi autos worse accuracy is 1st shot.

I find this topic interesting. Some articles say that the first shot is less accurate than the rest of the mag. I think this has been established? The explaination is that the first shot is cycled by hand and therefore different than the gun's cycling which is more harsh if we can call it that. The advise is to sling shot the slide to get the slide to slam the 1st round in the closest manner to how the gun will do it. To me it seems the difference would not be different enough to effect the round's accuracy? I do see how the slide is not slamming back as it does by hand but the forward motion would seem to be very very similar. What's causing the difference that is significant enough to cause this accuracy difference?



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Old October 6th, 2019, 12:27 PM   #2
 
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My first shot is always the most accurate. And the majority of the time it is dead center bullseye at 10 yds. Never could figure this out. Maybe just not expecting to do much on the first shot and relaxed. Who knows.
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Old October 6th, 2019, 12:42 PM   #3
 
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LOL Ok, everybody ignore that first reply. LOL These reports were from bench rest accuracy tests and I believe the distance would be mostly at 25 yards. Interesting Whiskeyshooter that you have seen this. If it were not you, but the gun, you could hand cycle each shot for GREATEST accuracy! Maybe, just too much effort for the results.
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Old October 6th, 2019, 02:19 PM   #4
 
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I have seen this occur in semi auto pistols. Not often, but it does happen. I was getting five shot groups with a nice four shot cluster and one flyer. After several groups with different ammo but the same result, I realized it was the first hand-chambered round that was impacting away from the group. Loading six rounds in the magazine and firing the first one into the backstop before shooting a group confirmed it. I think it was a friend's Browning Hi Power that was doing this, but it's been a few years ago.
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Old October 6th, 2019, 03:04 PM   #5
 
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With revolvers I see it as easier to understand. That is if a certain position in the cylinder keeps throwing the less accurate. The semi is a bit more difficult to understand. Of course it is nice to blame something on a bad shooting day. :-))
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Old October 6th, 2019, 03:07 PM   #6
 
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I've noticed all my semi-autos seem to hit where I aim on the first round - Ruger American 45, RIA 45 FS, S&W 6906, and even my SCCY CPX-2. Everything else is always a little lower, but often well grouped with the right ammo. I have targets saved from my local indoor range showing that the first round is in the center bullseye.

Makes me think if the assailant hits the door, I'll get him, but maybe only wound his accomplices. Never understood this, other than maybe the first recoil is making me "anticipate" after.
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Old October 6th, 2019, 06:17 PM   #7
 
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I mostly shoot wheel guns so no problems.
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Old October 6th, 2019, 06:52 PM   #8
 
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One explanation or theory is the 2nd and subsequent shots jar the cartridges the same way each time as the gun recoils, then feeds a new round into the chamber. This shifts the powder charge into the same position for each shot. One reason you see suggestions for slingshotting the first round to attemot duplicating the process.
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Old October 7th, 2019, 04:09 AM   #9
 
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Quote:
Originally Posted by ngashooter View Post
I have seen this occur in semi auto pistols. Not often, but it does happen. I was getting five shot groups with a nice four shot cluster and one flyer. After several groups with different ammo but the same result, I realized it was the first hand-chambered round that was impacting away from the group. Loading six rounds in the magazine and firing the first one into the backstop before shooting a group confirmed it. I think it was a friend's Browning Hi Power that was doing this, but it's been a few years ago.
Very interesting and good to know.
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Old October 7th, 2019, 05:17 AM   #10
 
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Hmmm. Haven't seen anyone mention barrel temperatures. First round cold barrel. Next ones get warmer and warmer.
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Old October 7th, 2019, 05:42 AM   #11
 
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Negligible effect at 25 yards or less.
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Old October 7th, 2019, 09:39 AM   #12
 
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I've never seen this . I shot NRA Bullseye Match for twenty years with a 22 semi-auto , 38 revolver and 45 semi-auto . I never did a sling shot load and have never felt the first shot was less accurate . On the contrary...the first shot usually was in the ten ring... it was after scoring that first ten that the shots seemed to go downhill ...actually the last three or four shots are the ones that are the least accurate .
Rifles may be another story...but with handguns my first shots are the most accurate .
Gary
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Old October 7th, 2019, 09:42 AM   #13
 
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If you are suggesting that the first round in a 2 1/2" group is a flier, who cares? I can't SEE a 2 1/2" group (what every manufacturer says their gun will do or better) at 25 yards.

If we are talking about a DA/SA pistol, then it would make a difference because you are dealing with different trigger pulls.
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Old October 10th, 2019, 06:47 PM   #14
 
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M first shot at the range is always the worst shot of the practice session. I chalk this up to my getting used to the gun (recoil, trigger, grip, stance, etc.). I guess if I shot every day, this wouldn't happen. When I was a younger shooter it wouldn't happen after I got used to the pistol. Now it happens every time.

I've never experienced the first round being worse than the rest except if the gun needs maintenance and/or repair or if I wasn't practicing good technique.

Now, as I tire, the results get worse. So I practice for accuracy and technique during the first 50-100 rounds and "fun" shoot the rest. While shooting is still great fun as I age, I find the requirements for a gun carry/home defense have changed from even 10 years ago. An older family showed me how to make these kinds of changes.
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Old October 10th, 2019, 06:51 PM   #15
 
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This is simple and has nothing to do with the firearm if it is a semi, it can be an out of spec chamber in the cylinder of a revolver, or a revolver slightly out of time. Otherwise if the semi is in battery the round is chambered just like any other...it’s the shooter being too quick breaking the first shot. The pistol is presented so it’s moving and we all are anxious to get the first shot off perhaps while the pistol is moving and sights are not yet aligned. On all subsequent shots the pistol is already bearing on the target and with proper sight alignment and trigger control and follow through, the follow up shots groups where intended. Slow is smooth and smooth is fast
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