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| One of Us |
I have a M70 classic in 7mm that I'm considering having rebarelled to .458 Winchester. Would the rails have to be opened up to get that cartridge to feed? Thanks, John | ||
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one of us |
Shouldn't The 7mag is basically a necked down 458 As usual just my $.02 Paul K | |||
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It MAY require tweeks to feed correctly, but the gunsmith doing the barreling won't know until he gets the chambered barrel fitted. Although the 7m/m RM and the .458 WM use the same basic brass, the formed cases and their bullets are both significantly different in shape. That means the cartridges of the two MAY need different feed ramp shapes in order to feed well. As there is basically no shoulder on the .458 WM, the fronts of the rails MAY also need to be slightly opened too. | |||
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One of Us |
I had this very conversion done recently on a stainless G17xxx series action and my 'smith used the newer SC mag box and follower and it feeds and functions like corn through a goose without touching the rails or feed ramp. The box has the relief "windows" in both sidewalls of the mag box and the follower is machined aluminum. It's a perfect stack for three .458WinMags. | |||
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One of Us |
Model 70s don't have cartridge specific feed rails; all feeding is controlled by the magazine box lips. Most of them work on many different ammo types. I think there are only 3 or 4 variations of them. Boxes. Basically, you should be able to stuff and feed as is going from a 7 to a 458. | |||
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Thanks, That's what i was hoping to hear. | |||
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I disagree. The 458 can be fed into the 7mm mag chamber to test feeding. Of course the bolt can't be closed, but that is unnecessary for the testing of feeding. Just remove the firing pin assembly, then load the magazine with 458s(or better yet, use 458 dummies) and work the bolt back and forth just enough to get the cartridges into the chamber and onto the boltface. That will tell you if it feed feed and eject 458s without tweaking. This was what I did with my 7mmRM Mark-X before having it rebarreled to 458. Feeding was slick before and after. Jason "You're not hard-core, unless you live hard-core." _______________________ Hunting in Africa is an adventure. The number of variables involved preclude the possibility of a perfect hunt. Some problems will arise. How you decide to handle them will determine how much you enjoy your hunt. Just tell yourself, "it's all part of the adventure." Remember, if Robert Ruark had gotten upset every time problems with Harry Selby's flat bed truck delayed the safari, Horn of the Hunter would have read like an indictment of Selby. But Ruark rolled with the punches, poured some gin, and enjoyed the adventure. -Jason Brown | |||
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