the hornady load book says you can reach 2200 fps with there 500 grain bullet out of a 24" barrel. are you guys actually getting this velocity?

I got about 2220 with AA 2230 and backed it off to 2150. I think I was still one grain shy of max. The kick was wicked in my light Whitworth.

History aside, with current powders, is it a problem to get 2100 fps with a 500 gr. bullet and acceptable pressure?

quote:

Originally posted by JeffreyPhD:
History aside, with current powders, is it a problem to get 2100 fps with a 500 gr. bullet and acceptable pressure?

Absolutely no problem. You can do it with RL7, AA2230, H335 and I am sure other powders as well.

Joe and I loaded up some ammo using the hornady book and shot it today for your other post

this data and one short barrel rifle data are posted on your big bore post

data collected 06 06 2017

75 degree day

chronograph ---lab radar--

458 win mag

rifle
zastava remington 798
26 inch barrel

aa2230 powder 500
grain solid hornady DGS
brass new winchester

70 gn 2142-- 2139
71 gn 2179--2165
72 gn 2188---2183
73 gn 2217---2205
74 gn 2230---2237
75 gn 2261---2264---2255---2264
76 gn 2279---2281
77 gn 2304---2307
78 gn 2328---2344

no excessive pressure at max powder
but some what flat primer
heavy recoil

compressed loads above 73 grains

215 federal primer all lit well

gun out of box 9.6 pounds

no scope

in the upcoming days we will test

a win 70 ---a CZ-- a montana-- and a custom weatherby --all in 458 win mag

to see the dif between guns and barrel length

using the same load sequence

the above listed rifles are 24 inch barrel approximate

will need to get more hornady bullets to run the tests

the aa 2230 powder is quite temperature stable it seems according to the literature

quote:

Originally posted by stradling:
Joe and I loaded up some ammo using the hornady book and shot it today for your other post

this data and one short barrel rifle data are posted on your big bore post

data collected 06 06 2017

75 degree day

chronograph ---lab radar--

458 win mag

rifle
zastava remington 798
26 inch barrel

aa2230 powder 500
grain solid hornady DGS
brass new winchester

70 gn 2142-- 2139
71 gn 2179--2165
72 gn 2188---2183
73 gn 2217---2205
74 gn 2230---2237
75 gn 2261---2264---2255---2264
76 gn 2279---2281
77 gn 2304---2307
78 gn 2328---2344

no excessive pressure at max powder
but some what flat primer
heavy recoil

compressed loads above 73 grains

215 federal primer all lit well

gun out of box 9.6 pounds

no scope

in the upcoming days we will test

a win 70 ---a CZ-- a montana-- and a custom weatherby --all in 458 win mag

to see the dif between guns and barrel length

using the same load sequence

the above listed rifles are 24 inch barrel approximate

will need to get more hornady bullets to run the tests

the aa 2230 powder is quite temperature stable it seems according to the literature

The 458 Win Mag round has come into it's own with the new powders like AA2230 we have today.

However I would not take 458 Win Mg ammo to Africa with a load that compressed the powder, even the AA2230. The powders being compressed in the early days of the 458 Win Mag combined with the excessive heat of the African bush caused the HANG FIRES, and failures to fire at all, may also do the same with compressed AA2230 powder in that heat. I see no reason to go above 2217 fps with a 500 gr bullet, and take the chance of something happening you may not like with a Buff, or Ele closing on you fast, intent on turning you into bloody rags!

.....................................................................

I think I'd just load the 480 Woodleighs at 2150-75 and call it the .450 Nitro Rimless Express. That would shed all of the bad juju I think....

quote:

Originally posted by BaxterB:
I think I'd just load the 480 Woodleighs at 2150-75 and call it the .450 Nitro Rimless Express. That would shed all of the bad juju I think....

Works for me...

And me too...

The trick is to use a drop tube to settle the powder. Huge difference, it settles 2-3 mm lower. The bullet barely compresses the powder, similar to a lot of loads in other calibers.

This is for my 72gr AA2230 with 500gr load that easily delivers 2150.