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Dashunde
September 12, 2011, 08:28 AM
{{{{Well... I came up with the question after reading a recent thread on a G23 kaboom and didnt find Sturmgewehre's thread with the video prior to starting this one. So disregard if you wish.}}}}

After proofing my SD rounds in my ccw's, I practice with WallyWorld Federal FMJ and rechamber the SD ammo when I leave the range, and then again after cleaning, and then again after...

I wonder if rechambering those SD loads after practice is seating the round too deeply and is increasing chamber pressures excessively?

My little LCP is easy on its ammo, but I have two other ccw's that I'm concerned about:
My PM9 is extraordinarily hard on ammo and noticeably deep-seats the Federal stuff ifs repeatedly rechambered (experimenting).
The SD rounds fare much better, but still seat just a hair deeper after two or three rechambers.

My G27, its much kinder to the ammo with no noticeable additional seating, but still... its a .40 and not to be toiled with.

What would the maximum allowable additional OAL reduction be for a +p 9mm and a standard 40?

mikejonestkd
September 12, 2011, 08:30 AM
Here's a video and a thread on the topic, Hope this helps:

http://thefiringline.com/forums/showthread.php?t=462320

HighValleyRanch
September 12, 2011, 08:34 AM
The general rule that I go by is no more than three rechamberings for any particular SD round.

ohen cepel
September 12, 2011, 08:54 AM
I make a point of firing my SD ammo every couple of months. The rechamber reason is part of it, plus, it may have been exposed to sweat, moisture, etc. while carrying it.

Plus, it builds my confidence that it and the mag will run right.

dunerjeff
September 12, 2011, 09:07 AM
It is possible to use a bullet puller to pull the bullet back out to factory lenght,then I'd shoot it.

MLeake
September 12, 2011, 09:19 AM
I shuffle the rounds in the magazine, so I'm not always reloading the same one. YMMV.

TailGator
September 12, 2011, 09:28 AM
I do what MLeake said. Specifically, I put the most recently chambered round upside down in the box. When reloading, it goes in first, and is therefore rotated to the bottom of the mag.

Dashunde
September 12, 2011, 11:24 AM
Hey all, I just became aware of Sturmgewehre's prior thread/video on the subject (Thanks Mike), so we can let this one die I suppose.