Have been playing with a new cartridge the 475 Turnbull. It is a 50-110 case shortened .200" and necked down to 475 cal.. Have about 12 different bullets for it and will have a Barnes 375 TS and solid for it too. Shooting the 375 TS custom up around 2500 FPS. SHot lots of animals this fall and it is working great. Have dies brass bullets for it too. This I believe will only fit in the Winchester 1886

You have PM inquiring about Browning 1886.