Hey
KC. I converted my Lyman Mustang to .25 ACP and have been happy with it. I was getting significant fouling in the breech area with 209s and the ACPs just about eliminated that, but not completely. I believe the ACPs also give me a little better groups. With the 209s I would get flyers insomething like one out of five shots. They wereway out there, maybe four inches or so from the main group.I don't get thoses any more.But to be honest I can't sware it's because of the ACPs. I used the 209s when the gun was quite new -for the first 100 shots or so, and then started with the ACPs. So maybe it was just a factor of the barrel getting broken in.
I use CCI 500 Small Pistol Primers in mine. I like them and haven't gone back to my 209 breech plug. But, as you know, every gun is different.
There is a certain amount of hassle associated with the ACPs. Yes, you will need a priming tool. I use a Lee Auto-Prime. They're inexpensive and work very well. You also have to clean the fired brass a little. They don't have to be shiney clean, just get the major fouling off of them.I knock the primers out of the fired cases with a small pin punch by putting the case in a socket and tapping the primer out.It's quick and easy.