Bigbulls, welcome to the world of ML! Personally, I have shot great plains bullets before, and I have never gotten good accuracy either. I shoot a knight wolverine .54 I' ve tried lots of different bullets over the years and have gotten stuck on the black belt bullets. they have the little plastic thing on the end (colorado acceptable) come in a few different weights and have alway shot really well for me. Sorry I can' t help you with your specific setup.

There is a gun shop (can' t for the life of me remember the name) down on Colfax and somewhere between Federal and Wads that I would recommend to you. I think it' s the best for ML here in the metro area. Lots of choices for anything you want.