Hi folks,

I put together an AR10mm carbine.

I used a Foxtrot Mike Mega Mass lower (13 0z buffer and 308 carbine spring), a slick side AR upper, a Kaw valley .40/10mm bolt, and a Faxon 16″ 10mm barrel.

The lower uses large pattern Glock Mags and has a last round bolt hold open. The Foxtrot Mike LRBHO is the best one available in my opinion and works fine.

The carbine functioned flawlessly from the first mag of ammo.

I reload and have a load workup that I think will be the one I use for hunting hogs. As will all recipes that people post on the web, use caution and start at least ten percent below what I am using.

180 gr XTP bullet with an OAL of 1.260
13.3 gr Accurate Arms #9 powder
Winchester Large Pistol Primers

Measured muzzle velocity with a Magneto Speed chrono – 1508 fps muzzle velocity with muzzle energy of 909 ft lbs. Using the published B.C. of .164 for this bullet, the bullet retains 725 ft/lbs at 50 yds and a velocity of 1211 fps and 586 ft/lbs at 100 yds. I am getting 1.25″ groups at 50 yds. Primers shoe some flattening, but not excessive. Case heads just above the extractor groove are .423.

Say oink oink little piggy.

• This topic was modified 1 month, 3 weeks ago by Waterloo Kid.
• This topic was modified 1 month, 3 weeks ago by Waterloo Kid.