I agree, I have been shooting BH ever since it came out I like heavy loads more than most and I worn out one breach plug in the Triumph and it took about the same number of shots as wearing one out with 777. I change mine as soon as I find my group size changing. At that point I modified a BP and tested it I have been shooting modified BP ever since the only one I wore out was one I made I switched to Savage vent liners and the Lehigh but have not worn any commercially made vent liner. The one I made myself was a lot of work and not heat treated.