I load the 350 gr. Hornady round nose with 60 gr. of Varget for a pressure of 29K according to the Hogdon net site. This is 2,000fps for about 3,000 foot pounds of energy, but I have not chronographed the actual load. I shoot this in my Siace DR in 45-70. Have not harvested an elk yet, but the penetration on wood is awesome. The Siace weighs just over seven pounds so there is some recoil, but it is so fun to shoot! Bob.