19 May 2007, 01:20
grizzinater450 ackley
is it possible to get 2400fps with a 500gr if so what would be my best bet
19 May 2007, 04:13
WhitworthI'm in the process of building one on a .458 win mag Mark X. Everything I have researched says that 2400 is well within its capability with a 500 grain bullet. I just had Superior load me some ammo with 550 grain Woodleigh softs and solids. I will chronograph the loads as soon as the rifle is done.......
19 May 2007, 04:58
D HumbargerAbsolutley but it kicks like hell!
quote:
Originally posted by grizzinater:
is it possible to get 2400fps with a 500gr if so what would be my best bet
Sure it can be done, but at what pressure?
I have not seen anybody reporting 2400 fps with the 450 Ackley and 500 grainers in a 24 inch barrel who could give any pressure data.
What bet? Powder, bullet, brass and primer combo load data?
One way to mitigate any pressure concerns would be to use a CZ with 3.8" box and use the standard .458 Lott throat and seat the bullet out to 3.75" COL instead of 3.6" in a Mark X.
The .458 Lott in a 3.8" box would probably beat the 450 Ackley in a 3.6" box, IF anybody wanted to.
20 May 2007, 05:14
Masteriflemanquote:
I'm in the process of building one on a .458 win mag Mark X.
I've been pondering a similar conversion on the same action/caliber. What bottom metal are you using or who is doing the conversion?
20 May 2007, 06:47
WhitworthThe gunsmith is Mike McClellan, who was the head gunsmith for Interarms in Virginia. Don't know yet what bottom metal he will be using yet as I just dropped it off to him. But, if you are interested, I will update you when I have more info.