Load data for 400gr bullet out of 450 Bushmaster (quickload?)

[mattri]

Not our usual fare but having trouble finding load data for a 4oogr lead bullet in a 450 bushmaster.

Rifle is a bolt action with and 18" 1:16 barrel.

Have found some data for subsonic loads using Uniquw that work very well but nothing else.

Have looked on 450bm.net, castboolits site etc.

Suggestions?

Thanks, Matt.

 

[Hino895]

When I was playing with lead Bullets out of my 458 socom I was sorta on my own.
I think I would start by using 458 socom data as a starting point.
Gas checks are definitely a big help.

 

[mattri]

Thanks for the tip, I'll keep looking but aren't finding much on the 458 either.

Think it would be worth contacting IMR/Hodgdon?

 

[Peter hunt]

Thanks for the tip, I'll keep looking but aren't finding much on the 458 either.

Think it would be worth contacting IMR/Hodgdon?

Look up 450 ackley magnum and you should get around what you need

 

[Ramblerman]

Look up 450 ackley magnum and you should get around what you need

Not the same class of cartridge boss...458 SOCOM is nowhere near a 458 Lott or even a Win mag...

 

[mattri]

Still looking for data.

Haven't worked with straight wall cartridges before, are pressure signs similar to bottlenecks?

 

[Zero333]

Still looking for data.

Haven't worked with straight wall cartridges before, are pressure signs similar to bottlenecks?

PM inbound !

 

[mattri]

Thanks!