Bumping up the .450/400 Nitro for the Ruger No.1?

[BlackRhino]

Hi folks;
Pressure of the old .450/.400 Nitro Express is low compared to more modern rounds that can be safely fired in a Ruger No 1. For instance, I reload for the Ruger the old .45/70 to 55.00 psi according to Barnes Manual No. 4.

Has someone hot .450/.400 reloading data at hand that are fired in Africa in a Ruger No. 1? Tanks for your help!

 

[Mark A Ouellette]

Many AH members rave about the killing effectiveness of the .450/400 cartridge!
I've never used it so I cannot verify this. Shot placement is key to a clean kill be the rifle be chambered for a .375 H&H or .470 Nitro.

I have experience loading for the 500/416 cartridge. While this 2325 fps cartridge can be safely loaded to 2450 muzzle velocity, the life of the new Norma brass I loaded was reduced to two or three loadings.

I ran this cartridge in LoadData dot com and found a 400 gr bullet at 2150 fps was about the hottest load listed. There was old A-Square date for A-Square 400 gr Dead Tough bullets at 2187 fps, but those bullets are not available and an increase of 37 fps would not be a notable increase in killing effectiveness.