I just got a new DPMS LR260 and can't find the chamber dimensions anywhere. Would they be SAAMI standard? The rounds I am loading will have a neck diameter of .294 when loaded (243Winchester brass necked up). I know that the SAAMI chamber minimum for a 260REM is .298 so as long as the camber is SAAMI I will be good. I would assume that DPMS would use SAAMI but when it comes to playing with things that do doom I like to be sure.