I am using some Meistner 95gr hardcast PB's in .327 Federal brass for my new single-seven 7.5" barreled Ruger. At 3 grains off a rest at 7 yards it shoots dime groups but at 25 yards they opened to a 6 inch spray pattern.
I have seen this before and the answer is generally "more velocity".
I recognize that I could just change powder, but, I started to calculate what the "max" charge would be in the .327. Using a kind of Rube Goldberg measuring approach, I believe that I can get 4.0 grains into the casing with the boolit seated and still not compress the round.
That said, I am going to the group. I don't always need to be the first to discover a bad idea. Anybody else ever try 4.0 grains of Trailboss in a 327 mag?
I have loaded 3 rounds which I can pull and dump if need be....
Thanks in advance for any advice, guidance, or comment.
v/r rch