Hi all. First. Just got an email from Doug at Pecatoinia Rivers about their Underhammer kit and what's available right now. They don't have any 1X36" Green Mountain (GM) in .54 cal barrels in stock and he said that GM won't be making any ML barrels in that configuration for at least 2 months. He does have a 15/16X36" GM barrel in .54 in stock OR a 3/4"x 16" Colerain in .54 cal. Never heard of Colerain. Is the 15/16 GM barrel just as strong and accurate compared to the 1" barrel and what about the Colerain? I really like the 1 in 70" twist in the GM barrels compared to the 1 in 56" in the Colerain. So I need some expert advise and opinions.