In Handloader No. 236 (Aug-Sept 2005) John Barsness authored an article titled Velocity and Pressure. In it he provides a table giving average muzzle velocity and average pressure for a 7mm Rem Mag using a 160 gr Sierra Boat tail, 66.0 grains of H4831 and Winchester brass. They tried different primers for the above load. Results were:
Winchester WLRM 3,045ft/sec 67,600PSI
Winchester WLR 3,024 64,400
Federal 215 3,036 61,400
CCI 250 3,039 61,500
Remington 9.5M 3,041 59,300
CCI 200 3,011 54,800
There's not much change in velocity, but changing from a CCI200 primer to a WLRM resulted in a 23% jump in pressure. I'm no engineer or internal ballistics expert, but since velocity didn't change appreciably, I can only figure these must have been peak pressure values. I suppose velocity must be more strongly correlated with the total pressure curve rather than peak pressure (I'm speculating on matters I have absolutely no education or training in).