BULLET WEIGHT147 GR. HDY XTP
ManufacturerIMR
Powder700-X
Bullet Diameter.355"
C.O.L.1.100"
Starting Load
Grains2.6
Velocity (ft/s)764
Pressure27,300 PSI
Maximum Load
Grains2.9
Velocity (ft/s)838
Pressure32,000 PSI
This is what Hogdon shows for the 700X under a 147 jacketed bullet.
Obviously barrel length will dictate power factor since I am sure you know the formula is (bullet weight x velocity)
Personally I always start on the low side and work up looking for pressure signs via the primers or the cases.
Just my two cents worth,