1:48 twist.

54cal!!

That .50cal just needs some care and will be in action very soon Just got to get all that liquid wrench out of there!

The bore on his current 50 is perfect, hes just having a little trouble with the drum and the oil that keeps coming back after he cleans it out.

Carb/brake cleaner should take that out i would think.

If not, a little gas'Oline and a match would burn it out eh?