I've used the Accubond in an '06 with good accuracy but not in the 300 WM. I used to have one but decided it was more than I'd ever need. I take that back I actually had 2. My first was a Savage 110 and the other was a Ruger 77 both in the left hand variety. I used to shoot Hornady 180 gr Interlocks pushed by IMR-4350 powder - I think about 71 gr if I recall.