Don't quite know what forum to ask this in, wanting to get my son more trigger time on his 223 handi, on the barn pidgeons
and sparrows with 22 pellets in 223 brass with rifle primers or 209,s (have lots of 209's).
I was confused for a while until I realilzed that you were talking about .22 caliber pellets, not 22 individual pellets stuffed into a .223 case. I have done it with standard primers just to see what happened (it works), but I think that 209 primers would give the pellets magnum pellet gun velocity. The only problem that I see is that there will have to be some sight adjustment. Has anybody tried this?
Saw this post. Now I got a project.
Drilling the flash hole to full size makes sense.
209s will require a larger primer pocket, then a funky manual primer install, probably with a dowel.
Would you expect a significant difference in velocity with a 209 over a large rifle primer in a 22-250?