Looks good Dave! Those shockwaves shot well. They're not a top of the line gun but worth every penny in my opinon. Mine loves BH as well.

As for holding the primer in, a friend of mine has a Yukon and he had that happen one day at the range. I inspected it to findthe BPwas about 1/2 turn loose. Snugged it up and that fixed the issue. That may not be what's going on w/yours but worth a look I suppose.

Edit: A "dogbone" capper is what I use and it works beautifully.