300 AAC Blackout build and range report

[Rocket88]

I recently completed an AR-15 in 300 AAC. I built the rifle up form various parts sourced from online vendors. Product selections had more to do with what was in stock than any master plan:

Upper:
AR Stoner BBL, MED contour, 5R, 1:8
DPMS de-featured thick wall upper
DPMS carbine length free float 2 piece tube
DelTon BCG
BCM large charging handle
Datum Gear low pro gas block and DPMS tube
YHM flash hider

Lower:
CMMG Multical
Rock River 2 stage trigger
ARFX skeleton stock
Houge grip

The rifle went together without issue, lower and upper fit is excellent with little rack. I used a poly wedge in any case to make the fit a bit tighter. It looks great and handles well. My intended use for this is feral hog hunting. To that end I worked up some hand loads based on various forum postings as well as QuickLoad. What ultimately wound up shooting the best for me at 100 yards is this:

125 gn Speer TNT HP
19 gn IMR4227
CCI 400
Hornady case, trimmed to 1.363"
COL 2.150"

Shooting off a bag at 100 with no wind produced the following average group size:



Im very satisfied with the rifle and after working out a large matrix of cartridges I think Ive got a good short range hog gun.