It helps to read the original post as the OP was taking about 357 Mag and 158 gr bullets.
Thanks, I noticed that. I also noticed that the response to which I responded said "a" cast bullet. No caliber designation nor weight of projectile. Once generalization begins, we all lose.
But I'm not splitting hairs! Agreed on the safety point you make.
But I wonder: Unique has been around for a mighty long time. While we do know that manufacturers periodically tweak powder makeup, how much can Unique have been changed that would all of a sudden make a 10 gr charge unsafe in a stong action?
I suspect we see these changes in manuals with the progression of time because of the litigious society in which we currently live.
But the discussion was 357 Mag 158 grain and continued to say so in the rest of Alks post,
Regardless as mentioned I have data for a higher charge of Unique but am not going to post it. I do not agree with the all of the posted info either.
So it's just a short hair.
"DO NOT even think about using 8 gr. Unique with a cast bullet. Alliant, and previously Hercules, has never listed more than 6.8 gr. Unique for a pressure of nearly 34,000 PSI. To increase the load to 8.0 gr. will increase pressure by ca. 35%, and that is for single-base powders. Double-base powders, as are all Alliant pistol/shotgun powders, is a completely different matter. If you want/need higher velocity then use 2400, it is the propellant used for initial cartridge development of the .
357 Magnum in the early 1930s, and still cannot be improved upon for full power loads for this cartridge. "
