I think the velocity is your best indicator of safety / pressure. I don't know of any magical rule of physics that allows a rifle to produce more velocity with the same amount of pressure, all else being equal. The myth of "fast' and "slow" barrels operating at equal pressure is just that - myth. If the exact same load is shot in two different barrels of equal length, faster velocities are produced by more pressure. What varies is tolerance/tightness of chamber and bore, bore surface finish, and such. A fast barrel has a tight bore, short throat, or some other contributing factor.When comparing bullet of equal weight, but different manufacture, add in variations in hardness of the bullet, shape of the bullet, friction of jacket material, etc. Ballistics offers no free lunch.
Last edited by castnblast; 08/27/21.
