Chucks Hawkes recoil table shows the heaviest .338 load at over 35 foot pounds of recoil and the heaviest 45-70 at 37.9 foot pounds and the velocity is higher for the 45-70 too. And the heaviest load he shows for the 45-70 is 350 grains at 1900 fps. You can load it a good bit hotter than that.
