This is my "go-to" dangerous game rifle. It has accounted for one rhino, three elephants and five Cape buffalo. I have used it for over 50 years now and it has never failed me. It is built on a P14 Enfield action with a Dayton Traister cock on opening conversion, as are all my P14/M1917 Enfields, and I have never had a trigger problem with any of them. I had a gunsmith, now deceased, who swore by them and was a specialist in installing them. I think the "problems" with the trigger are more due to faulty installation than any inherent flaw in the design.
The caliber is one of my own design, the .505 SRE (Short Range Express), the middle cartridge of the three in the photo. It propels a 570 grain bullet at 2150 fps, the same as a .500 NE. The case is a .460 Weatherby case, shortened to 2.500" and necked up to accommodate a .505" bullet. It was developed in collaboration with John Buhmiller, who created a similar wildcat on a full length .460 case.