I just took two revolvers to the range with me. My SP101 in 327mag, and a brand new GP100 4"blued I just bought yesterday, and BE-86 loads for both.
My results were totally opposite with these two calibers.
I used the same mid range .357mag loads I shot the killer group with, and the results from the first experience repeated it's self.
The GP100 surprised the living heck out me with excellent groups (new to me) and it confirmed to me that the BE-86 in .357mag is a winner for sure. The target below is the second six shots I took with the 4" GP100 after I knew what to expect.
This group is my personal best, probably for all time, and I couldn't have had a better way to start a love affair with this new magnum. I put the first three threw the same hole with witnesses watching.
The picture below is that second group, the sights almost were dead on out of the box.
I put the first three through the same hole, one beside it, and of course choked on the 5 shot then sucked it up for the sixth.
This new powder is super in ,357 mag for mid range loads and I still can't believe how clean it is in .357 mag and 9mm.
Notice I only said .357mag and 9mm. I also took my Sp101 in .327 fed mag.
It's notoriously accurate and I had work done on the trigger assy, I shoot it very well at 25yds.
I loaded BE-86 in it for the second time and found it is still a miserable failure with my loads. I shot the worst groups I've ever shot with this pistol using this BE-86 with the same bullets I have always used in it, since I bought it. It was all I could do to keep 4 of the 6 rounds in the 7 ring at 7 yds.
OK THEN! Back to Universal and 231 for midrange loads with lead bullets in the .327FM.
After I got home and looked closely at the Sp101, it was the filthiest I had ever seen, after just 50 rounds. Terrible load!
It was 5.3 gr of BE-86 with lee tumble lube mold, 90gr lead SWC, and no crimp. This bullet has always shot well for me in this caliber with any other powder.
I have to be fair about this powder and my tests. This stuff is terrible in my .327FM.
Sorry Alliant but I have to be honest.