MudRunner2005
Well-Known Member
Ummm, no, I own both a .30-06 AI and a .300 WinMag. I also own larger .30 calibers, and smaller .30 calibers. The .30-06 will not keep up with a .300WM when loaded to the same pressures with the same bullets. Period.I think you're forgetting that the .300 Win Mag was developed 60 years after the .30-06, and the nominal pressures used in turn of the century rifles, with their metallurgy of the time, were pretty conservative. He didn't say that the '06 matched the the .300, he said that you can get pretty close with '06 handloads in a rife built with modern metallurgy, to a .300 off-the-shelf round. There's only about 4,000 psi difference in peak pressure between the two, and if it doesn't flatten the primer of a .300, it won't do so with an '06.
Taking it a little hotter in the '06 won't detonate a gun designed to proof at pressures well into the 70,000+ psi range. Hatcher drove some of the early pre-WW1 Springfields well past that without damage. (Not the ones that were built in a hurry during the war, with improper metallurgy) But yes, 25 grains higher case capacity is definitely going to benefit the .300 when both are handloaded.
If you want to compare apples to apples, then use the same nominal pressure to both...The .300WM (of which I am not even a fan) will stomp the .30-06 Springfield into the dirt. Despite owning them, I dislike both cartridges equally, so there is no bias in my opinion of them...Only facts.