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Posted: 4/9/2013 6:32:00 PM EDT
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I know there is a 458 SOCOM out there, and there is a 450 (452) Bushmaster, but seriously, the 458 has way more bullet choices since it is a rifle sized bullet.
That said, the 458 SOCOM uses unique to the caliber brass with a .47 base like a 308 that's where the similarity ends.. Why not wildcat a 458 that is along the same lines as a SOCOM but with a chamber that you could form from cut off 308 brass? Yea, I know custom dies and making brass, but dies are a one time cost, and face it for someone who shoots a lot (self) my scopes cost more than my rifles, and my bullets cost about as much as the rifles to every yr, a couple of hundred for dies it peanuts. |
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sounds like a good idea! you should do it and let us know how it turns out.
advntrjnky ETA: the .45win mag and .44 auto mag have already been done, so a lot of the leg work has been done already....only problem I see is not enough neck thickness left with .308 brass. you would probably have to use 9.3x62 mauser brass to at least get to a usable minimum. |
| .429 is about as big as you can go with .308 brass, think .44 Auto Mag, cut off .308 to make the Automag case. You would have to blow the case out to straight or beyond to fit a .458 bullet in there. If blown out straight you willmore than likely run into feeding problems and if beyond straight, well that's not going to happen. Even if you could do it, you would lose one of the great advantages the .458 SOCOM has over the other large bore cases, a shoulder to headspace on instead of having to headspace on the mouth which limits your ability to crimp. |
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Sounds like a 458 American? No? No as a matter of fact. The .458 x 2 inch American was based on a standard magnum sized bolt face with the case cut back to two inches. The .450 Marlin is almost an exact copy of the .458 x 2" inch American except the belt is thicker to prevent someone from chambering it in a long magnum like the .375 and then lighting it off. The .458 x 2" would be way to long to fit in an AR platform and even if you cut it back to shorten it up the bolt face would either have to be rebated (as is the .458 SOCOM) or it would have to use an Olympic type upper and bolt. And if you did all that you still would have to remove the belt to make it fit the magazine better and feed more smoothly. The .450 Marlin has been used in the LR platform but from what I have read it is not exactly setting the world on fire. |
| Even if you decide to use a .308 case, you are going to have to turn the inside of the case down because the brass is too thick. Its not worth the aggravation unfortunately. I was thinking about a SBR'd .44 in a .308 case awhile back, its doable but a lot of work per cartridge. |
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I hadn't thought about the dims on a 308 case and that it's too narrow to put on a shoulder and get a 458 bullet into it. I should have remembered the 44 Automag could be made from cut off 308s. A 284 is probably too fat and not particularly less expensive than the SOCOM brass so that probably wouldn't work either.
I've got a couple of 45-70s and I like the idea of a bug bore in the AR platform but the brass availability for the SOCOM is a little bit of a pain. |
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I hadn't thought about the dims on a 308 case and that it's too narrow to put on a shoulder and get a 458 bullet into it. I should have remembered the 44 Automag could be made from cut off 308s. A 284 is probably too fat and not particularly less expensive than the SOCOM brass so that probably wouldn't work either. I've got a couple of 45-70s and I like the idea of a bug bore in the AR platform but the brass availability for the SOCOM is a little bit of a pain. as compared to completely unsupported wildcat? At least the .458 socom is proprietary and has fairly good mainstream support. advntrjnky |
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I hadn't thought about the dims on a 308 case and that it's too narrow to put on a shoulder and get a 458 bullet into it. I should have remembered the 44 Automag could be made from cut off 308s. A 284 is probably too fat and not particularly less expensive than the SOCOM brass so that probably wouldn't work either. I've got a couple of 45-70s and I like the idea of a bug bore in the AR platform but the brass availability for the SOCOM is a little bit of a pain. as compared to completely unsupported wildcat? At least the .458 socom is proprietary and has fairly good mainstream support. advntrjnky No, as compared to something that a reasonably competent reloader could form from readily available and inexpensive brass. That was the point of the thought expressed in original post. |
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Talk to Ron Williams of RMW Xtreme, his .458 RMW fill your needs. It is the 50 AE necked down to .458. He is hunting with 300gr bullets @ 1800fps + out of a 12" bbl.  That may be the answer I'm looking for. Yea, you have to buy a set of custom dies and probably a reamer if you ever plan to rebarrel, but then again there are a couple of reamers in my bench now so it's not going to be the first. The difference in 50AE vs 458SOCOM would save you the cost of the dies on the first 500 brass. |
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Quoted:
Talk to Ron Williams of RMW Xtreme, his .458 RMW fill your needs. It is the 50 AE necked down to .458. He is hunting with 300gr bullets @ 1800fps + out of a 12" bbl. That may be the answer I'm looking for. Yea, you have to buy a set of custom dies and probably a reamer if you ever plan to rebarrel, but then again there are a couple of reamers in my bench now so it's not going to be the first. The difference in 50AE vs 458SOCOM would save you the cost of the dies on the first 500 brass. Yes you could order custom dies but I got a set of hornady socom dies and Ron trimmed them down. Last time I got brass I got 500 once fired for cheap and have had great case life. |
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