Originally Posted by
Mike R.
I just bought a Lyman GPR in a 54 cal.
Would some of you guys that shoot a Lyman GPR (54) help me out with some basic info?
Like, what size ball you shoot? powder (FF or FFF)? Cap size...10 or 11? grains of powder (70, 80, 90)? patch thickness and lube recommendation?
Right now I'm casting my own balls, using a Lee mold, for a 44 Remington. They seem to be a tad bit larger than the 451s that are store bought. I'm wondering if this will hold true for round balls I cast for a 54 cal. rifle?
Thx!
I have two of the Great Plains Rifles and two of the Lyman Trade Rifles. They can take the larger size ball and still fit with a .015-.018 patch. I use moose milk as a patch lube, but there are countless lubes out there. In my 50 caliber I shoot both the .490 and .495 ball. In the .54 caliber I shoot both the .530 and .535 ball.
They take a #11 cap. And if you find ignition problems, order a RMC stainless steel nipple for the Lyman Rifle. For some reason the nipple that comes with the Lyman sometimes don't seem to have a large enough flash hole.
The .535 were tight but you can load them. 90 grains of 2f powder and then a patched roundball. What I would suggest is get some store bought first and see which size works best for you.