You might post this in gunsmithing. Or, give Tractorshaft a PM to ask him about his, he did a good job of shortening his 336.
https://www.24hourcampfire.com/ubbth...owflat/Number/3096502/page/1#Post3096502


Gunnery, gunnery, gunnery.
Hit the target, all else is twaddle!