I hear you, now I need to find ammo

[edgarspencer]

Originally Posted by Bill Zachow

I stopped buying shells from RST when they sent me a flat of 16 gauge shells for my O frame 16 gauge hammer Parker. The shells had the lousy, overly thin primers that pierced on every shot. After 4 shots I quit using them as I did not want to damage anything from the blowback. I reload using modern 209 primers with no problem. When I mentioned this to Morris at a Parker annual meeting, he did not want to talk about it so this unhappy customer went down the road.

I rather doubt Morris hand picked thin primers just for you. Piercing cheddite primers on Parker hammer guns is not uncommon, but the problem lays with your gun, rather than the primers. It is a clear indication that your firing pins have, just as many Parker hammer guns, worn to a pointed profile and need to be dressed properly. You may have had better luck with another brand, which most likely had thicker Remington or Winchester primers, but pointing blame at RST is pointing in the wrong direction.
I too have pierced Cheddite primers, but only in hammer guns, and rectified the firing pins right away, never having had the problem again. I would estimate I've used more than 25,000 Cheddite primers in 12, 16, 20 and 28ga.