9mm setback?

[donster]

I've heard about setback in .40 where the rounds are continually loaded and unloaded causing kabooms. I'm just wondering if 9mm rounds have this type of problem? Thanks.

[Philadelphia]

Originally Posted by donster

I've heard about setback in .40 where the rounds are continually loaded and unloaded causing kabooms. I'm just wondering if 9mm rounds have this type of problem? Thanks.

Measure, chamber them several times and then measure again.

IMHO, has more to do with the interaction of the gun and the ammo than just the ammo. Headspaces on the cartridge mouth so setback is caused by the feed path and banging into stuff (locking block, ramp) on the way in, not chambering per se.

[vafish]

Originally Posted by Philadelphia

Measure, chamber them several times and then measure again.

IMHO, has more to do with the interaction of the gun and the ammo than just the ammo. Headspaces on the cartridge mouth so setback is caused by the feed path and banging into stuff (locking block, ramp) on the way in, not chambering per se.

+P

It's more the gun than the ammo.

I had a 1911 that would set back JHP's after the 2nd or 3rd time in the chamber.

With my Glocks I've re-chambered the same round 10 times and not detected any setback.

[fredj338]

It can happen w/ any semiauto round. The pistol plays a part, but ammo is very important. I've seen factory 45acp setback. I've seen 9mm setback w/ thin brass (like RP) & jacketed bullets. Taper crimping helps but won't solve proper neck tension.