wanneroo wrote:I did some H110 loads last year to use up some powder I didn't like from 300 Blackout and it worked fine in 357 Magnum. I think next time I load 357 I am going to try IMR 4227 which has worked well so far in 300 Blackout.
I might be wrong, but from watching yanky youtube videos IMR 4227 looks very similar to ADI AR2205 - it seems to be a stick powder of a very similar density. And while it's listed as "equivalent" to H4227 / H110, those are both ball powders, so fundementally different.
And in my experience stick powders give you better std-devs compared with ball. Does this translate to tighter groups? Not necessarily, it's just a variable. In some cases loads with higher std-devs group tighter
go figure