ORIGINAL: vangunsmith
Its built on a 98 mauser,and if you look in POAckleys book,Im sure you heard of him?Volume 11,page 161 youll find the load you were talkling about. 139 gr bullet. 55grs of 4350 powder== 3250 fps velocity.
I'm quite familiar with Parkers loads. He published whatever loads the wildcat proponent sent him. He didn't test them. Most are exagerations of the highest order. I'm aware of his efficiency theories too, but there is no way you can exceed the velocity of a load using 10 grains LESS powder in a different case.