Oal, 9mm. 40 s&w [Archive] - Glock Talk


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08-25-2012, 09:22
Hello to all that " ROLL THEIR OWN" I had a misshap with a box of 9mm WWW from walyworld. I had 1 round that not only jamed my G-26 but blew the mag. out of the pistol along with the but plug. I took it to my local smith (with theblown out brass!) and he told me it could have been caused by bullet setback from the factory or The box was droped to cause this ? The brass just above the ejector ring was in sorry shape. lucky it had no affect on the pistol.had it checked out. anyway can someone give me the total safe OAL of the 9mm. and 40 s&w so I can check each round before loading the mag ? any help or info. would be welcome.
thank's ghr1142

08-25-2012, 10:14
OAL depends on bullet weight. There are established maximums. Your best bet is to get handgun case gauges from Dillon. I use them to check every round I buy or reload. In reloading, I use 1.140 for 9mm 147-gr and 1.135 for 180-gr 40's.

See http://www.dillonprecision.com/#/content/p/9/pid/25548/catid/3/Dillon_Handgun_Case_Gages

08-25-2012, 11:14
DO you want max or mining OAL?

For Glocks a good OAL is 1.125 to 1.135.

08-25-2012, 13:41
Just get a box that you know has no problems and measure those rounds.

08-25-2012, 17:13
DO you want max or mining OAL?

For Glocks a good OAL is 1.125 to 1.135.

There really is no min OAL, it will be powder charge & bullet wt specific. I have reloaded 9mm as short as 1.050" OAL, no issues.
My rule of thumb for factory ammo & setbacks, once it has setback 0.060", pressures are rising fast. The smaller the case & higher the pressures, the faster that pressure will increase w/ setback. SO measure your factory ammo, discard any that are 0.060" shorter than avg OAL.