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Rifles, Reloading, Optics, Equipment
Reloading
375 RUM with 350gr MK
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<blockquote data-quote="yorke-1" data-source="post: 921471" data-attributes="member: 11960"><p>I've used both RUM brass and 404 brass. </p><p></p><p>375 RUM brass needs to be necked up and then necked down to create a false shoulder when fireforming. It's a lot of stress on the brass, but I have 50 pieces which I've formed this way. Fireforming them is easy though. I just load up starting load for a 375 RUM and have at it. They shoot very well while doing this and still give 375 H&H performance with a 300 gr bullet. </p><p></p><p>404 brass just needs to be necked down and fireformed with a little bluedot and some cream of wheat. I happened to have 60 pieces of Norma 404 brass sitting around when I came up with this idea, so this was a perfect use for it.</p><p></p><p>If I were to do it again I would probably just run a straight 375 RUM and have it throated for the 350gr bullets. That would save the cost and trouble of custom dies and a custom reamer and still get you some very impressive numbers. If I wanted more performance than that I'd just move up to something along the lines of the Allen Magnums. RUM brass is hard to find and not the best quality, 404 brass is hard to find and expensive when you do find it. The 375 Allen Xpress will give the same performance and use better quality Lapua brass. I'm running mine off of a Savage and at the time there weren't any Savage actions available to handle a Lapua sized case head. Other wise I would have gone with a 375/338 Lapua improved.</p><p></p><p>Andrew</p></blockquote><p></p>
[QUOTE="yorke-1, post: 921471, member: 11960"] I've used both RUM brass and 404 brass. 375 RUM brass needs to be necked up and then necked down to create a false shoulder when fireforming. It's a lot of stress on the brass, but I have 50 pieces which I've formed this way. Fireforming them is easy though. I just load up starting load for a 375 RUM and have at it. They shoot very well while doing this and still give 375 H&H performance with a 300 gr bullet. 404 brass just needs to be necked down and fireformed with a little bluedot and some cream of wheat. I happened to have 60 pieces of Norma 404 brass sitting around when I came up with this idea, so this was a perfect use for it. If I were to do it again I would probably just run a straight 375 RUM and have it throated for the 350gr bullets. That would save the cost and trouble of custom dies and a custom reamer and still get you some very impressive numbers. If I wanted more performance than that I'd just move up to something along the lines of the Allen Magnums. RUM brass is hard to find and not the best quality, 404 brass is hard to find and expensive when you do find it. The 375 Allen Xpress will give the same performance and use better quality Lapua brass. I'm running mine off of a Savage and at the time there weren't any Savage actions available to handle a Lapua sized case head. Other wise I would have gone with a 375/338 Lapua improved. Andrew [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
375 RUM with 350gr MK
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