I have a T/C Sys. 1 .54 cal. Muzzleloader with a 1-38 twist, and plan to use a .45 cal. 300 gr. WFN or LFN LBT style bullet depending on which shoots better due to the slow twist. The WFN is shorter so it should shoot better. Has anybody used T/C Break ' O' Sabots, and can they handle 150 grs. of Pyrodex Pellets? Are they better for accuracy than T/C Mag Sabots? Do you know who makes a .54 cal. Sabot for a .50 cal. bullet? Thanks in advance.

Everything I have read states that the Break-away sabots are intended for loads under 100grs. of powder.
" Precision Rifle Bullet" makes some excellent polymer tipped bullets you may want to look into.
www.prbullet.com

handloader i shoot a t/c thunderhawk in 54 cal. that has a 1 in 38 twist the best bullet i found that shoot great are made by percision a 350 grain poly tip sabot with a charge of 115 grains of pyrodex select and a cci mag no #11 cap.i am also just switch to a cci musket cap lot more fire and some triple 777 max load is 80 grains of this stuff.

Lonewolf:

What kind of groups are you obtaining at 100 yds., and if you know, what is your velocity with the 350 gr. bullet? Thank you.

handloader on an average day at the 100 yard target from a bench rest 3 shot groupe inside 2 inch groupe on a great dayi have done a little better also using a 3x9x40 millet scope have no idea on velocity you can go to percision web page and see how far and how flat there sabot shoot http://www.prbullet.com/