What kind of rifle are you shooting these through? What twist? It will not hurt to shoot the conicals through the rifle. In fact it should be a lot of fun. Just do not get upset if the accuracy you expect is not there. As for loads, if all you're doing is breaking the rifle in, 50 grains is plenty. If you want to see what they will do, start at 70 grains and work up from there. Many of the new rifles do not really need as much of a break in period as some of the older rifles did.