.22 cal pellet powered only by a shotgun primer in a modified .223 round with an AR will penetrate completely through a 2X4 as well, and it's very quiet.
That's pretty cool. I'd never heard of that. A quick search will show how it's done. I don't see any advantage to a 22 conversion kit but it's one more idea and from a purely academic standpoint a cool project. One more information arrow in the quiver is always good. Thanks
I love the P22, I have one of those limited edition ones where you can swap out the barrel lengths. I usually keep it in the 5inch length and it's not picky with ammo. I can even shoot the 710 fps CCI Quiet with a suppressor after a good clean and lube.
Maybe it has and I'm just out of the loop. All I know is I followed it pretty closely for years as each new company would come out with what they claimed was safe, and then like two weeks later someone would be on youtube showing it squib. When the major ammo manufacturers get on board is when I'll be convinced it's actually safe.
Before of ever hearing of this I tried it in the 22 hornet about 10 years ago, but kept with the small primer, not to ruin my case.
Yes, I copied the design and did a little engineering on my part when building several of the .223 rounds since I have a lathe available. Made it pretty quick with the correct reamer, drill bit and countersink to make the primer pocket that would accept the 209-shotgun primer and allow it to be removed easily. Then took a small punch to dimple the case neck right at the base to hold the pellet in place.
