I think my bro is using 30:1, maybe 40:1 in his Sharps with bore sized bullets AFTER patching.

This is his long range load. He is not using a cookie, but is wiping with a bore pig after every shot.

He is also loading 85gr. 1 1/2F Swiss in the .45/70 case with only .050" compression, thin wad and bullet is only in the case 1/8".

This TYPE of loading regime works in his 18" twist.
Do you know what the rate of twist is in your rifle, Wayne?