40 sbn

[Mike]

bobw & Caprock,

Many thanks. I was puzzling over why an original chambering was not more popular like the 44-77 & 50-70 you mentioned. I see alot mentioned about the 40-70 straight, the 40-70sbn, not so much. What was the twist rate for the original rifles in 40-70 sbn? Also was the original twist rates the same for all the 40 calibers?

Sarge

Sarge, In Cartridges of the World there is a listing of cartridge data which includes rates of twists. My old edition shows a rate of twist of 18-20 inches for all of the Sharps .40 calibers, bottlenecked or straight. I'm not saying that's a fact, only what is listed therein. (They do seem to have trouble with dates in that book, maybe ROTs too.) And all of this talk, where I'm listening a lot more than talking, has me interested in trying a .40/70 BN again. Shoot sharp, Mike