ar stoner issues

[Trock03]

Trock03,

In view of the less than definitive response I received from Brownells today http://www.65grendel.com/forum/showthrea...5G&p=87206 (Scroll down to Reply #49), I would appreciate your checking your recently-acquired factory-loaded Hornady 6.5 Grendel 123-grain SST cartridges, in the Brownells Barrel, per the routine in Reply #11, above, at your convenience. Thanks.

Good shooting, this weekend!

SNS - Won't get a chance to shoot until tomorrow but just got done running through your checklist. Here are my results with factory Hornady 123gr SST:

First, I removed the ejector and gravity fed a round into the chamber. Bolt bolt closed with a little effort. I can't drop the round in and spin the bolt freely but a slight push and twist allows me to lock the bolt. The round won't fall out without dropping one of the small Otis brass rods down the barrel but I can't find any marks on the bullet/casing. To be honest I'm not sure if the bolt should close and lock with no effort at all or if there should be a little resistance. Regardless, I'm not concerned about the slight amount of resistance I'm seeing.

Reassembled the bolt and hand chambered a round that I had colored with a Sharpie. Used the weight of the BCG to chamber the round. Slowly extracted the round without allowing it to be pushed against the barrel extension. Observed very slight land marks that start 0.074" from the end of the case. The marks were just enough to lighten the coloring I applied but not remove it. Round measured 2.242" before and after.

Grabbed an AA 123gr Scenar and chambered with the weight of the BCG. Locking and extracting was significantly more difficult. Had to tap the charging handle with a dead blow to unlock. Land marks were a little more pronounced. Land marks start .127" from end of the case. Round measured 2.264" before and after.

Brass dimensions are identical for the most part.

Will post some pics comparing AA and Hornady primers after the range tomorrow.

TC