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Hunting
Long Range Hunting & Shooting
WSM/ SAUM on a Rem. Mag Action
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<blockquote data-quote="Jon A" data-source="post: 3088" data-attributes="member: 319"><p>Yes, getting those fat-assed cases to feed can be a bitch! I recently had my 300 Win Mag A-Bolt rechambered to 300 RUM.</p><p></p><p>I thought all I had to do was buy a 300 RUM magazine and pop it in. WRONG! The magazine wouldn't even fit into the rifle. It was too fat and too tall (at least Browning made the mag big enough).</p><p></p><p>I had to trim a bunch of material from the mag to even get the floorplate to close. Of course it still wouldn't feed--AT ALL!</p><p></p><p>I had to open the opening at the bottom of the action slightly to make these fat things even fit through. Then I had to "round off" the feed ramp leading into the chamber as well as the material that backs the locking lugs at the rear because this fat cartridge simply wouln't fit through the opening provided....</p><p></p><p>So, it now feeds slick as snot. But it wasn't easy. If you hear from my next of kin that I've blown my head off, then you know not to try what I did at home.... <img src="http://images/icons/grin.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Anyway, it can be done but it isn't easy. Your best bet is to buy a rifle intended for one of these things or have a really good gunsmith build you one.</p><p></p><p>As a Mechanical Engineer I'm pretty sure the modifications I made are about exactly the same as what Browning did to their production 300 RUM's and did not reduce the margine of safety of the action. I'm pretty sure my action will hold...but I don't recommend anybody else try this at home!</p><p></p><p>This is why serious African hunters like the .300 and .375 H&H....</p></blockquote><p></p>
[QUOTE="Jon A, post: 3088, member: 319"] Yes, getting those fat-assed cases to feed can be a bitch! I recently had my 300 Win Mag A-Bolt rechambered to 300 RUM. I thought all I had to do was buy a 300 RUM magazine and pop it in. WRONG! The magazine wouldn't even fit into the rifle. It was too fat and too tall (at least Browning made the mag big enough). I had to trim a bunch of material from the mag to even get the floorplate to close. Of course it still wouldn't feed--AT ALL! I had to open the opening at the bottom of the action slightly to make these fat things even fit through. Then I had to "round off" the feed ramp leading into the chamber as well as the material that backs the locking lugs at the rear because this fat cartridge simply wouln't fit through the opening provided.... So, it now feeds slick as snot. But it wasn't easy. If you hear from my next of kin that I've blown my head off, then you know not to try what I did at home.... [img]images/icons/grin.gif[/img] Anyway, it can be done but it isn't easy. Your best bet is to buy a rifle intended for one of these things or have a really good gunsmith build you one. As a Mechanical Engineer I'm pretty sure the modifications I made are about exactly the same as what Browning did to their production 300 RUM's and did not reduce the margine of safety of the action. I'm pretty sure my action will hold...but I don't recommend anybody else try this at home! This is why serious African hunters like the .300 and .375 H&H.... [/QUOTE]
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WSM/ SAUM on a Rem. Mag Action
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