It’s still factory case capacity, the difference is in the way it is chambered. I attached a link explaining the differences.Excellent! What is the case capacity difference between the +p and standard rum?
I would have to disagree with the comment about having to use a window mag box. I use the wyatts cfe-09 4 inch box and have no problems feeding any ammo.While the bolt face is the same diameter as the standard belted magnum cartridges, the body diameters are different with the RUM body being decidedly larger in diameter. The Remington M700 action will handle the RUM cartridge (Remington Ultra Magnum), it's important to pay attention to the width of the opening in between the action rails. Action rails are cut to allow the cartridge to feed from the box by the follower up into the feed ramp. But there has to be enough material left to hold the remaining cartridges down. You may need to adjust the feed ramp as well.
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The RUM cartridges, like the WSM cartridges, require the magazine box with the triangular windows cut into them. Getting some cartridges to feed reliably is both skill and art.
From left to right: .376 Steyr, .375 Flanged Magnum, .375 H&H, .375 Ruger, .375 Weatherby Magnum, .375 Remington Ultra Magnum, .378 Weatherby Magnum.
Except you have to cobble up the bottom of your action to make that box fit and now it's only use is with that box.I would have to disagree with the comment about having to use a window mag box. I use the wyatts cfe-09 4 inch box and have no problems feeding any ammo.
I would love to have a 7WSM like they are working on.It’s still factory case capacity, the difference is in the way it is chambered. I attached a link explaining the differences.
I believe that you will need to use the wyatts cfe-0 that box will give 3.90 lenght.Any thing longer like the 350 smk if loaded out to max will be single load. and the action will need some mods to fit the 700 action.So it seems it’s doable I believe. I can’t find any bottom metal for the 375, would a 338 bottom metal work since they’re both the same parent case?
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