Re: Stevens Barrel lengths. I have some Stevens Favorite barrels in .25 Stevens Rf and .32 Long RF they measure 21.75 inches and 22.0 inches in length Breech face to Muzzle. I also have a Ideal barrel in .22 Long Rifle that measures 28.0 inches in length. All are the "Half Octagon" style with Ideal one being larger in overall sizes. All of my barrels are bored on center at the breech end.
I am 'resurrecting' two 1894 series Stevens Favorite actions and intend to have a spare breech block reworked into Center Fire type for m Rim Fire type, and am replacing the original soft, low alloy and low carbon, steel screws and pins with modern higher strength replacement materials.
My initial intent is to get one action operating with a modern cartridge of similar length and pressures to the .25 Stevens and .25 Stevens Long, these are the .25 ACP Semi rimmed cartridge and some resized and shortened .22 Hornet cases reworked to Cylindrical bodied and the length of 1.125 inches, similar to the .25 Stevens RF case.
From information posted on the website "Ballistics by the inch" I gather that the .25 ACP Factory Loads (SAMMI Pressure Limit 17,400psi) will have a MV of around 1000 to 1100fps from the 21.75 inch Rifle barrel. As to the .32 Long RF, it will be loaded to the Lower SAMMI pressure limit of 13,700psi for the .32 Colt.
This will allow these old firearms to "Speak" again with lower cost re-loadable cartridges.
Enjoy your restored .22LR Stevens Crackshot, it should be good for "Pot Meat" and local 'varmints', as it was originally used for these purposes by the youth of the era.
Best Regards,
Chev. William