Hi Guys, new to the forum and first post. I bought a DPMS LR-260 with the intent to do some long range shooting. For optics, I am using a Leupold VXIII 3.5-10X50 mounted with Burris Tactical Mounts. After shooting about 20 rounds I replaced the trigger with a Jewell. The trigger was outstanding but after about 20 rounds I started to suffer light primer strikes with some primer flow back into the firing pin hole.These are the same loads that were fired with no problems with the old trigger group (40.5 grains IMR 4350/140 grain A-Max @SAMI specs. I sent back the Jewell and ordered a Giessele DM trigger. Seeing this is my first AR, I am looking for any type of recomendations as far as stocks, gas blocks, buffers, and anything that will improve this rig.