Anyone have any experience with 1:20 twist and 21" barrel

[sman]

What loads, Powder and bullet?
 Thanks for any help

[Forestclimber]

I would try a heavy bullet in a sabot with 90 grains of powder for a start.
I use 300 grain Hornady XTP's with 2F powder.

[Lane]

What loads, Powder and bullet?
 Thanks for any help

Is it a 45cal gun?

[sman]

50 cal.

[tc scout]

I used a Barnes 250 gr. MZ sabot with 80 grs. of 2F in my old 50 cal. TC Scout muzzleloader, which was 1:20. 
 Seems the longer bullet worked better than shorter ones. IMO the shorter bullets were stripping if you pushed them too fast. I liked that bullet very much, had a good stockpile I got on sale. They were devastating on deer.
Decided to sell it and bought a TC Triumph, couldn't begin to get the MZ down the barrel. Gave them to someone on the forum.
Now shooting Hornady 250 Gr. SST's with 80 grs. BH209.
The Barnes MZ's are a little pricey but work well in a 1:20 twist IMHO.
                               Hope this helps, TC

[builder459]

longer bullets are the ticket with that twist.and lower velocities also.like below 1750 fps.325 or 375 gr buffalo SSB.300gr expander mz with a smaller dia sabot if your rifle is tight bored and the 300 gr xtp.you can visit precisionriflebullets sight he goes into depth about the 1:20 twist and how difficult it can be to work up a accurate load.

[k]

i have a white mtn carbine 1/20" that shoots great with 70gr. vol. t7 3f with .40 200g harvester bullet inside a 50/40 harvester crushrib.this loads almost to easy but the results did'nt lie.with a lyman peep i was easily grouping 1 1/2--2" at 50 yds with a wobbly sawhorse as a bench with me on my knee's. thats about as good as i can do without a scope.........karl

[Swampman]

T/C Cheap Shot & 80 grains of 3f Goex Black Powder or Pyrodex RS.