Re: My .264 win mag loads are too slow
To make that 264 mag move get you some Retumbo.
I have a Rem 700 with a Shilen 27 3/4" barrel in 264 WIN mag. and the load that I am going to try out deer hunting in two weeks is 66.5 grs Retumbo, WW case reformed from 7mm mag cases, CCI 250, 130 Nosler Accubond ten thousands off the lands, 3350 fps and it shoots in the .4s @ 100 yards.
I tried IMR 4350, H-4831, AA3100 but could not get the velocity with accuracy I was looking for. Then I tried Retumbo and bingo.