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Thanks gotM4 for your always prompt help. Don't think I'm gonna get 2700 fps out of a 14.5 barrel with XM193. Oh I don't the good Doc care's for me. Though I do adhere to his advice.
Average muzzle velocity for XM193 is about 3050fps out of a 14.5" barrel. So it's probably good to about 75-100yds for reliable fragmentation. Personally I would use 68gr HP Hornady or 69gr HP Sierra for 'carry' ammo in an under than 16" barrel with 1x9 twist (if you can get the FBIs rifle ammo even better, IIRC their load is the Federal 64gr). For less than 16" 1x7 twist barrels my 'carry' ammo is 75gr Hornady TAP or 77gr Black Hills red box.
A FBI friend of mine out of Quantico says that their load works better than the 75gr and 77gr rounds. He says the 75gr and 77gr outperforms their 64gr loads in his words only in the 'naked man theory' meaning no barriers. I'm sure his opinion is a little biased as he did a lot of testing it and had something to do with it's adoption.
I've moved this thread to the Ammo and Reloading thread.
Chief Armorer for Elite Shooting Sports in Manassas VA
Chief Armorer for Corp Arms (FFL 07-08/SOT 02)
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