Don, there are a bunch of threads on the subject, failures to fire due to hard, recessed primers are the biggest reason and why H&R has discontinued production of that caliber, they got too many complaints concerning failures to fire. FWIW, those that shoot sporting ammo in theirs love them, but the reason too many shooters bought them was so they could shoot cheap milsurp, which H&R warns against in the owner's manual.
Tim