450 Marlin load data

[Weatherby2]

Good day I recently purchased a steyr in 450 Marlin off the ee and I have loaded up 300 gr tsx with fantastic results but my question is, has anyone on here loaded up the Barnes 500gr tsx fb for their 450's? If so what powder did you use? And load data if you don't mind please?

 

[4fifty8]

Got .450M BLR takedown & .450M Ruger No.1-S. Heaviest bullet loaded Hornady 500gr @ ~1675 fps mv (No.1) & ~1725 fps mv (BLR) using same H4198 powder charge. I worked up from a fairly low start charge to get these muzzle speeds thought to be near maximum.

Assumed my .450M's operate safely well above Marlin lever 43,500 psi max pressure.

https://i.imgur.com/apj9u0a.jpg / https://i.imgur.com/bgmOfTH.jpg / https://i.imgur.com/VfkDNId.jpg / https://i.imgur.com/1QBgaXD.jpg