| DarylS |
| (.700 member) |
| 29/12/11 11:46 AM |
|
Re: .458 Win Mag vs .458 Lott vs .458 Express
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Quote:
In the Man Magnum magazine January 2012 edition Paul Phelan describes how he took a 480gr Hornady DGS bullet and lathe turned an extra cannelure into it, 2mm lower than the one it came out with. This enabled him to seat the bullet 2mm out and still be able to crimp it. This in turn gave him some extra case capacity for extra powder and thus higher velocities without excessive pressure and without compressed loads. He obtained 2200fps. Now, if one already has a 458 Win Mag, this obviates the need for a Lott or Express. Except if you really want one.
Rimfire - if you use a Lee Factory Crimp Die, you can crimp a bullet anywhere you want. It doesn't need a crimp groove as the action of crimping is via a collet action, not a pushing action into an internal ring.
My .458 2" had such a long throat, just over 3/8", that I could seat the bullets out the same as a 2.4" Winchester or Sharps case, thus giving me the same ballistics as the longer case - in a Mauser.
The same scenario can happen for a .458 WinMag as noted in Rimfire's post. A longer throat allows seating the bullet out. The normal throat of a .458 was always a long one, years ago.
Check your chamber before you try this.
I achieved 2,060fps with 510gr. Winchesters from a mere 2" long case, along with 2,200fps with 400gr. bullets. The 500gr. load (2 of them) actually beat some of the factory ballistics of the .458 Win. Mag. a while back and matched what Speer chronographed in the #9 manual (1995?) in a Ruger #1.
Lee will make that crimp die for you, for $25.00 + about $5.00 shipping for the .458, the Lott or whatever. I am currently having one made for FatBoy's 8x68S Magnum. They will have received the order by now.