Been to the range twice now to work up loads for my Knight Disc Extreme. Trying to get Barnes 290 gr. TMZ to shoot with Blackhorn 209.
Boat tail bullets in muzzleloaders are nothing but headaches. The T-EZ Flat Base 250 and 290s are far easier to work with.
As pre-packaged bullets, they come with MMP HPH-24 sabots. Ideally, you want a .003 - .004 in. interference fit for best accuracy. They are available from Barnes in 75 pc. bulk packs, bullets only, so then you can pick the sabot that best fits your individual rifle's bore. HPH-12's are stronger, and the best choice for many Green Mountain and Savage barrels. If you have a "tight-barreled Thompson" (several examples here have been .497 - .499 in. land to land) the HPH-24 is likely going to be the choice.
