Keith,
I shoot a Knight Disc Elite 50 cal. My preferred bullet is a 250 gr Barnes Expander. I wouldn't say I had bad results, just not as good as the results I get with T7 - in terms of accuracy. It is CERTAINLY cleaner than T7. With T7, I can put 5 rounds at 50 yrds in a ragged hole, at 100 yards I can put 5 rnds in a 1.5 inch group. With BM3, I went to a 3 inch group at 50 and a 5 inch group at 100.
Busta, Classic Arms in East Lansing, MI is stocking BM3. Last time I was in there, they still had some on the shelf. If you're interested in the balance I have, I sent you a PM. Let me know. Mike