The 40-70 Sharps Straight Challenge is not to shoot better than me or the next guy, but load and shoot it well, and share what is working for you.
The 40-70 can be a stinker. It is an old-time favorite of hunters and found regularly in old match rifles as well. 330gr and 370 grain bullets were the norm.
I have two rifles chambered for it and kinda sorta tamed one of them years ago. It is the 14.5" twist Sharps but don't shoot it much. It is an Axtel 1877. My other 40-70SS, a Winchester 1885 with an even faster twist has really been a puzzle. I dug it out of the very back of the safe where it has been for years and I am going to try again at a silhouette match tomorrow.
What do you have that is working? Don't be a lurker. Let's hear it.