I've been casting for a few or my friends Marlins - two are 336 CBs and another is a 116 year old 1893 in 38-55. The bores on the newer 336 Cowboys came in at .379 - .380" and the old 1893 came in at .386" yikes!!! Lands are strong and sharp but the bore is dark. It is showing a little promise with the Lee 379-250 RF bullet as cast .380" with soft alloys but it looks like it'll end up getting relined.

The 336 Cowboys do very well with .379" cast bullets, the Ranch Dog TLC 379-235 RF in particular

[Linked Image]

Unique, Red Dot, Trail Boss, Re7, IMR 4198, 2400 have all produced excellent loads.

I can't wait to get my 336 CB in 38-55 (converting a Texan). GREAT caliber.

Last edited by WetDog; 06/05/10.