Brother and his good friend just bought 2 of these, immediatley sent it out to get the barrell fluted after they got it. Got it back a few days ago and brought them to the range today. The damn thing shoots great with factory ammo, brand name only. We have a couple of cans of green tip that we bought at the gun show last summer, and every other round will jam. The one thing that I have noticed is the green ammo is ALOT hotter than any of the store bought stuff. HMS and Wolf jam every shot. The casing has to be pounded out with a cleaning rod. Im thinking they are hotter loads and are expanding too much in the chamber, causing the cylinder to lose grip of it on the cycle. I also bought a can of .223 from the same vendor, and it cycles thru the Colt M4 Commando with no problems, never had a cycling failure. And yes, if you were at Ben Avery today, we were the three assholes pounding out .308's for 4 hours. Sorry. Especially the nice family next to us, we didnt mean to make your kid jump every time we pulled the trigger. Anyone else have a DPMS Panther or have seen one have these issues?