I am in the process of picking up another all weather Ruger 77 in 350 mag. My sole purpose for this gun will be to send it off to Montana Rifleman for a new barrel in 450 Marlin.
I have grown quite fond of the Speer 350gr Hot Core bullet and will be building this rifle around that bullet. I am going to go with a 20 inch barrel of 1 in 20 twist or there about.
The Ruger 77 is capable of withstanding a 25% increase in CPU's over the Marlin 1895 that this cartridge was designed for. My question is what percentage of an increase in velocity does this translate into? Since the Marlin at 42,000 CPU is producing just over 2000fps, would it be reasonable to think that at least with the light 350 gr Hot Core that it would be nipping at the heels of the 458 Win mag when fired from a chamber pressure of around 52,000 CPU? I know the velocity is not going to increase in direct % to the CPU's.
Anybody done a bolt gun in 450 Marlin?