Presschecks & Bullet Setback?


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Skunkabilly
July 3, 2003, 09:07 AM
Will presschecking in either rifles or pistols cause bullet setback?

Specifically M1As, AR15s, Berettas, 1911s and P7s?

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Tamara
July 3, 2003, 09:27 AM
No setback will occur if the bullet isn't being smacked nose-first into the feed ramp. If you press check in a normal fashion there is no way for this to happen.

Skunkabilly
July 3, 2003, 11:24 AM
Tamara, what about chamber loading a Beretta?

Thumper
July 3, 2003, 11:59 AM
I've experienced this with the 96 but not the 92. Strange, because the .40 bullet would seem to have more bearing surface on the case than the 9mm.

Hmmm...maybe the flattened meplat of the .40 vs. the ogive of the 9 banging against the ramp has something to do with it?

Either way, I've never noticed setback from repeatedly chambering a 9mm in any gun.

Thumper
July 3, 2003, 12:04 PM
Posting again to add that, since about '98, PMC Starfire .45 ACP ammo has proven really prone to chambering setback in just about everything.

1911s can cause a little setback in almost everything over a half dozen rechamberings or so.

Just measured the chambered round in the only gun I have with me right now (I'm at work) and it's a teeeensy bit shorter than the next one in the mag (230 gr. Hydra Shoks).

Dave T
July 3, 2003, 03:45 PM
In support of Tamara's post, correctly "press checking" means you only open the action/breach enough to see that a round is chambered. You should not fully extract the round from the chamber so there is no possibility of bullet set-back, give that you perform the press check correctly.

Thumper
July 3, 2003, 03:49 PM
Right...Tam covered that.

Then Skunk asked about chamber loading. See?

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