Hey guys,I've got a DPMS 16" ss bull upper on an oly arms lower.I don't have a match trigger yet ,but I've done the trigger job mentioned on this forum.I've topped this with a nikon buckmaster 4.5x14x40 scope.I went out today and shot groups with different ammo to see what ,if any,factory ammo shot well through the rifle.I had some white box remington fmj,some green box rem psp and some win supremes with the ballistic tip bullets.Groups were five shot groups from 100 yds off a bench.The remington ammo would put 3 rounds tight and two flyers,this is with both the fmj and the psp.Groups ran from 1-1/4 to 2.5" with the fmj's and ball tips shooting the best.Smallest of two groups shot with ball tips was 5/8" and largest was 1-1/4".Suprisingly the fmj's shot better than the psp bullets.Also shot some gun show reloads,five shot group was 2.5",crappy to say the least.All bullets were 55 grainers.Guess this should be mildly encouraging since it seemed to shoot the ballistic tips pretty well.And for cheap fmj ammo 1-1/4 isn't too bad either.I've seen alot better on here though.Any body care to share some wisdom with me on this subject.I know I should try different weights as well as brands.I also intend to reload this round and would like to do it on a Dillon progressive.Any one know of a powder that shoots and meters well.Thanks for any help.