[dkf]

I agree F106.

Here are SAMMI speced drawings for common Glock calibers both finished rounds and chamber sizes. Notice the +.004" -.000" tolerance on the chamber ID. Length tolerence is +.012" to +.015" -.000". Quite a bit of leaway.

http://www.saami.org/PubResources/CC...Luger%20+P.pdf
http://www.saami.org/PubResources/CC...40%20SandW.pdf
http://www.saami.org/PubResources/CC.../357%20Sig.pdf
http://www.saami.org/PubResources/CC...0Automatic.pdf