You can use any published load data for a jacketed or lead bullet as long as it is the same weight bullet. Berry's Manufacturing does not research or publish load data, but any of the load data books or the powder manufacturers' website should have that information for you.
We guarantee our standard bullets to handle velocities up to 1,250 fps, and up to 1,500 fps for the bullets designated as TP (thick plate).
We recommend very little crimp on the bullet, just enough to put the pressure against the bullet without denting or deforming the plating. If you were to pull the bullet out of a case; with a proper crimp you would find no more than a scratch on the surface of the plating. If you are denting or deforming the bullet your accuracy will suffer and the bullet may start to tumble before it hits the target.