i have cva optima magnum
i am looking to buy another gun because i can't get nay grouping whatsoever.i'm not sure what the problem is.
150 gr 777 powder
175g powerbelts
i'd go with tc
I think your problem is too much powder and maybe simply not the right bullet.
Just because my rifles are .50 caliber, that does not mean that
ANY .50 caliber projectile will shoot well out of it, with
ANY powder charge. You have to work a load up. I have no experience with a .45 caliber rifle. Personally, get a hold of CVA and tell them that the .45 caliber barrel you purchased for the rifle will not shoot accurate and see if they would trade you for a .50 caliber. I think you would be more happy with that.
In my CVA Magnum Staghorn.. the magnum is 90-100 grains of powder. Anything more then that and the accuracy suffers. Keep that rifle in 90 grains range and it will shoot a lot of different projectiles very well.