roanmtn,
The .30-40, as I have pointed out in my Gun Gack books, has just about the same powder capacity as the .308 Winchester--but was also a semi-copy of the .303 British. Which is why my favorite handload in both .30-40 and .303 rifles capable of handling "modern" ammo is a 180-grain bullet with around 48 grains of 4350--whether H or IMR. This gets around 2600 fps--depending on barrel length--and works well with cup-and-core bullets. The bullet used on the doe mule deer was the Winchester Power Point 180.
