I used to have problem with HP type of ammo in one of mine. Found out that sometimes the cheaper stuff leaves some deposits in the chamber (duh, a slap the forehead moment) and had to clean it with good bore brush.
Another had similiar problems, and a quick polish with the dremel to the feed ramp cured the problem 100 percent.
Ed
Another had similiar problems, and a quick polish with the dremel to the feed ramp cured the problem 100 percent.
Ed