300 win mag load ?

[Jrainey]

My results mirror yours.
Almost same load , but at 50 or 55 thousandths off.

 

[sjones]

I have 3 300 Win mags. I shoot 200 grain Barnes LRX in 2 of them and they shoot well, but I have several boxes of 175 grain lrx bullets sitting around. Was thinking of using those for the 3rd 300 win mag. I use h1000 for the 2 that shoot the 200 grain bullets. Somewhere in the back of my head I seem to remember reading that h4831 is better for lighter bullets.

What powder would you start load development with on the 175 gr Barnes LRX? I am only interested in powders that are known to be stable from a temperature point of view.

This is what I use for my Dakota Arms 300WM Best 3 shot group:1-3/8" at 600 yds
180 gr Barnes TSX
H4831sc 75.8gr
Fed 215 mag primer
3026 fps