458 reload specs please

[Richard Coody]

Whooo....

Don't believe my range session would last very long. Could cause me to develop a bad flinch!

Now downloaded to maybe 45 long colt velocities that rifle could be fun.

 

[piie]

So is it made from a Lott or a win mag ?

Mr Hunt - apologies - seems I need to eat some humble pie. I was COMPLETELY mistaken in my statement that the 450 AI "may be very close to the 458 Express - both are full length 375 H&H necked up to 458" - in fact, the 458 Express is 2.99" vs the Lott's 2.8" - miles off... The advise given to use starting loads of the Lott however is safe, and then there is also the good source of loading information as posted by Kurz. Apologies again.

 

[Peter hunt]

Yes, absolutely, it was the two different 350 grain SPFN bullets.

I would hesitate to even consider a 500 grain bullet at 2,800 fps. That might sting a little...

I did get some 600 grain Barnes moving nicely in a .510 Wells Express (or .500 A-Square) at around 2,450 fps which was a little thumpy. My practice load was an unusual so called 'black powder' bullet which weighed 425 grains. Fired from an 11 lb. rifle it was actually fun to shoot!

Anyway the whole line of .450s or .458s was fun to play with. I might need to take a look at a Lott for the future.

thank you for the information I found that the case length my rifle is 71.1 mm which makes it a ackley improved lot do you have any more load data for this rifle any would be helpful thank you

 

[Kurz]

Peter,

I'm sorry, I don't have any data for your longer case. But the general rule of thumb is that you could select data for standard cartridge and work up from there.

But as long as you're careful...

You can start with the .350s crimped in the groove with about 80 grains of IMR-3031. But if this is hard to find in Australia, try H-4895 or VVN-530. Work up slowly using a chronograph watching for signs of pressure.

 

[INTJ]

thank you for the information I found that the case length my rifle is 71.1 mm which makes it a ackley improved lot do you have any more load data for this rifle any would be helpful thank you

I PMed you data from PO Ackley and A-Square a couple days ago