18" brownells grendel barrel review

[mongoosesnipe]

Barrel was ordered back in January for whatever that is worth, the only markings on it are 6.5 Grendel 1-8 and brownells muzzle is threaded 5/8-24, factory spec amax does not touch the rifling at all aa loaded 123 scenar ammo kisses the rifling ever so slightly doesn't leave a mark on it just has a little bit of resistance when un chambering a round

The group measures .16 ctc, aa lapua brass, 120 smk, 30gr. 748