Hi WCF I have the baikal sxs 45/70 and have used 10 or so box's of leverloutions in mine and they shoot quite well and are fine on fallow deer. I load 350gr RN hornadys 49gr of AR2207 for 2040fps for my home load and use these on sambar, my home load just hapens to group in the same place. Both my home load and the leverloutions get your attention as the rifle is only 6 1/2 pounds.I also have some 400gr speers and some 405gr remingtons that I will load later, I will try for about 1900fps. On barrels of my rifle it is stamped maximum operating pressure 2200MAR or 31900HST this is not trapdoor loads in fact it is marlin loads.