These were TC's version of a single bolt and free floating the barrel on a muzzleloader 99% of the time they don't work because everyone holds a gun different on these synthetic whichs pushes the bullets everywhich away. I have fixed several of these by bedding the stock so there is no flex in them. (yes there are exceptions as always!) Muzzleloaders are a different animals and free floating isn't the way to go on them, with their heavy barrels that don't heat up like tapered rifled barrels. Either bed it or shim it to make it consitent and it will shoot one whole lot better groups for you. I have been keeping count and to date I have made 31 happy customers with this advice. If your works out ok, please let me know. Thanks Mike. Happy Holidays to you and yours>>
Mike