I swapped the 209 breech plug on my Omega with the .25 acp cal conversion from MuzzleLoadingBullets.com


http://muzzleloadingbullets.com/thom...er_encore.html

It works great with Triple 7 loose powder, less crud rings, cleaner barrel. I haven't tried it with pellets.
I spoke to the folks at BH 209, they said it doesn't work well with their powder. I've heard that others have used small pistol mag primers in the .25 acp cal brass and had no miss-fires using BH 209

I reload, so priming the .25 acp cal brass isn't a problem. They sell a hand-held kit to load the brass for around $30.