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rhuff · 12-24-2014, 04:22 PM

I have no experience with the 9X21 cartridge. I deal with 9X17, 9X18, and 9X19 ammo. I handload the 9X17, and 9X19 brass. I can't seem to find much information in my reloading manuals concerning the specs for the 9X21 cartridge. I will do some more research concerning SAMMI specs on OAL and velocity for that round that you are required to shoot in your converted/rechambered Luger.

Added:
From what I have found so far, the std. velocity for the 9X21 round is in the 12-1300fps range. Perhaps the box for your ammo will state it's factory velocity. The OAL is dependent on the bullet and it's profile, like is found in any factory ammo. The longer brass case allows the bullet to be seated deeper so that the OAL can mimic that of the 9mm(9X19) round of 1.169-1.171in. range. Your ammo has a shorter OAL, but still may function with a quality mag.

12-24-2014, 04:22 PM	#9
rhuff Patron LugerForum Patron Join Date: Mar 2011 Location: Az. Posts: 2,315 Thanks: 2,748 Thanked 998 Times in 733 Posts	I have no experience with the 9X21 cartridge. I deal with 9X17, 9X18, and 9X19 ammo. I handload the 9X17, and 9X19 brass. I can't seem to find much information in my reloading manuals concerning the specs for the 9X21 cartridge. I will do some more research concerning SAMMI specs on OAL and velocity for that round that you are required to shoot in your converted/rechambered Luger. Added: From what I have found so far, the std. velocity for the 9X21 round is in the 12-1300fps range. Perhaps the box for your ammo will state it's factory velocity. The OAL is dependent on the bullet and it's profile, like is found in any factory ammo. The longer brass case allows the bullet to be seated deeper so that the OAL can mimic that of the 9mm(9X19) round of 1.169-1.171in. range. Your ammo has a shorter OAL, but still may function with a quality mag.