I have been shooting the TBBCs for years with very good results. I have used them in .223, .7mm-08, .7mm Rem Mag, .308, .264 Win Mag, .300 Win Mag, .338 and .375 H & H. My kids and I have taken whitetail, elk, mule deer, moose, caribou, eland, sable, mountian lion, African lion, cape buffalo, water buffalo, kudu, impala, wart hog, feral hog, black bear, grizzley bear, various sheep and goats as well as axis, blackbuck, sika, fallow, etc. When properly loaded they have always been an excellent performer. Jack had a very good idea when he designed these tough little bullets.