Not sure if this should be here or somewhere else, but since it is antique specific, I did it here...Mods...Please move if needed 
When I acquired my #3 it came with two boxes of Russian ammo.
Since finding out I have a 44-40, can the ammo interchange? I did lay the two side by side and it looks like the 44-40 ammo is just longer...The 44-40 I have is new stuff and I am sure will be to powerful for the old gun.
The box of Russian stuff says it is adapted to S&W and Colt.

When I acquired my #3 it came with two boxes of Russian ammo.
Since finding out I have a 44-40, can the ammo interchange? I did lay the two side by side and it looks like the 44-40 ammo is just longer...The 44-40 I have is new stuff and I am sure will be to powerful for the old gun.
The box of Russian stuff says it is adapted to S&W and Colt.