Looking at past 12-bore shotgun conversions and also double rifle builds.

The usual cartridge chambering is the .577 3" NE. Shooting a 750 gr projectile. Up to 2000 fps.

The .577 2 3/4" NE, sometimes also called a Light Nitro, usually is loaded with a 650 gr projectile. 1850 fps.

Historically what was the 2 3/4 inch cartridge used for? I believe it started as a black powder express cartridge.

Who used it historically? Did anyone write about using the LNE or the BPE? On what?

Users of .577 cartridges? Would you say the 2 3/4" is good for elephant? I know members here have used it many times on water buffalo. So no doubt cape buffalo is in its capability. How would it fare as a DG back up DR?

If getting a shotgun conversion,met a Greener Empire shotgun, would you choose the LNE 2 3/4ers, or a full 3 inch? Why? Safety?

If getting a DR made from scratch no doubt one would use a full 3 inch.

Please discuss these questions or other relevant points of discussion.