Back in the early open major days almost everyone was using SRP in their guns, it was just something that had to be used. To this day I strictly use SRP in my 1911/2011 pistols. In my lightened p320's/tanfos I have to use small pistol but some of the guns will fire SRP. It won't hurt the gun at all whichever primer you use. And based on the Atlas/Vel ammo primer test there is negligent difference between velocities and pressure.