Originally Posted by dumbear
This is great infomation here. I have a couple of questions though. First off I have been using sm. rifle primers in the 209 adapters from Precision Rifle w/777 and wonder if these would ignite the Blackhorn powder. Second, I was going to try the new IMR white hots as I've read good things about it as well. Anyone on here tried this new IMR stuff?
No, you will need to use magnum primers in the 25ACP conversion, and even that may be iffy in cold weather. Some people claim to have gotten it to work, others claimed occasional failures to fire even with the magnum primers.
I shoot more ML than centerfire, out to 500 yds. I am still on 777 and have not tried BH209, though I would try it if I could find any. The price is insane if you shoot any real amount, and it can cause its own problems (very HARD deposits in the breechplug and flame channel).
Some say they can fire dozens of shots without swabbing, others report that this is not the case. Pick who you believe!
All in all, the only real advantages are a modest increase in velocity (only matters at 300+ yds), a reduction in swabbing, and supposedly less cleaning. It takes me all of 5 minutes to clean and oil my Omega, I don't see what the big deal is.