I've had my DPMS LR 308B for about a year now. Perhaps 1500 rds through it. It has been totally reliable with all domestic factory ammo & all of my reloads. (read that as NO failures of any kind) The rifle's accuracy has been very good with 100 yd groups ranging from 3" with some factory ammo & reloads using Win. 147 FMJs to 5/8 ~ 7/8" 5 round groups with my reloads. (168 Sierra HPBT match & 42.5 RL15 or 41 of IMR 4895) These groups fired using a Harris bipod and my Mark 1 mod 1 shoulder, no bags.
The best factory ammo was the Federal 150 gr Power shok which yielded groups just under 1" and cost less than $15.00 per box at Wal Mart!
It does have a very tight chamber, the brass is not stretched appreciably nor is it difficult to resize. I get at least 5 reloadings from my brass, usually discarding due to loose primer pockets.
The rifle was ordered from DPMS with a cryo barrel, Hogue overmolded pistol grip & JP trigger, all of which I can recommend as being worthy options.
If nothing else, order or buy your rifle with an upgraded trigger as the stock triggers are worse than dreadful, the only negative factor in an otherwise excellent rifle.
Roger