Why not just use a 1/8"thick piece of leather and punch primer size holes about 1/16" in from the edge of the leather, then cut a slit with a razor blade from the edge of the punched hole to the edge of the leather. To operate, just place the primer in the hole and pull sideways to release the primer. I have made similar cappers for #11 caps.
Bought mine when it was marketed through Winchester, but it looks like CVA has the exact same one. However, the reviews of the CVA do not seem too good. My Winchester works pretty slick using Winchester 209 primers in it.
The leather one home made would not work well at all for mutiable shots in my Remington 700's.
I have the CVA one in the link yes some times the pry bar part comes in handy but the rest of it for me sucked.
U S Air Force Korean vet. NRA Member
Fourth fighter wing Kimpo Korea 1952 Fourth but first, the mig killers.
533rd material ,air defence Oxnard AFB 1953-1955
Pastor of the CBCG-Fellowship group Tulsa Oklahoma.