Fellas, I've have a 10.5" ar pistol and LC M855 ammo is having some issues, i.e. failure to extract. Just to test I used different mags and still the same issues. Next I ran some IMI M855, and that ammo ran like a champ. I suspect that the IMI ammo is loaded just a little hotter than the LC ammo. Looking for some range/plinking ammo hot enough to reliably work my ar pistol. It can be M193. What brand do you guys recommend?