Originally Posted by BobinNH
Originally Posted by bellydeep
OK, so can anyone explain to me why RL26 in the .270 Win can hit 3050 with 150gr bullets;

7mm WSM can hit 3150 with FOUR different 160gr bullets;

But the 270 WSM barely breaks 3100 with 150gr bullets in 1 out of 3 different loadings?



Pressure.

It's all guessing unless you have equipment to measure it.


And proper reference Ammo to calibrate it !

The problem with hot-rodding a .270 is that the book loads are based upon the 65Kpsi SAAMI standard.

Once you're Over that standard you are Over!

MD has stated here several times that traditional pressure signs don't show up until 70Kpsi +

Is your receiver Trued, and the Lugs lapped ?

Please tread carefully