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Hunting
Long Range Hunting & Shooting
Thinking of re-chambering my .30-.378....looking for more velocity
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<blockquote data-quote="Fiftydriver" data-source="post: 183689" data-attributes="member: 10"><p>I would be very suprised if you would get any more velocity from any of the 30 cal wildcats based on the 416 Rigby case. The reason is because they are very similiar in case capacity to the 30-378 and in most cases, the Rigby cases are not designed to handle high pressure loads as they are designed for a load that drives a 400 gr 416 cal bullet to 2400 fps and thats it, this is with very mild pressure. Sure you can jump the pressure up but your case life will decrease dramatically.</p><p> </p><p>My 300 Allen Xpress is based on the 338 Lapua case. This capacity is actually quite a bit smaller then the 30-378 but I am getting some truely impressive performance out of it for one reason, the Lapua case will take dramatically more pressure then the Wby case and still have a good case life. In my 30" 300 AX, I started testing with the 208 gr A-Max and settled on a load that is producing 3420 fps. Yes, this is a high pressure load but bolt lift is effortless, extraction is great, no ejector mark on case head, no primer loosening and this by the way is not the highest load I tested. She pushed near 3500 fps before I decided that was enough. Just started to feel the primer pockets loosening and a bit of bolt resistance on that those loads.</p><p> </p><p>My point being, you do not have to go with a larger case all the time, the 300 AX has about 10 grains less volume then the rounds your talking about but it has a huge advantage in case strength and quality for that matter.</p><p> </p><p>In addition to that, cases are less costly then the Wby cases.</p><p> </p><p>Before you do anything however, shooting your 30-378 to see how it does is the smart thing to do. It may suprise you and you may well be happy with that level of performance and a factory chambering is much easier to deal with.</p><p> </p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 183689, member: 10"] I would be very suprised if you would get any more velocity from any of the 30 cal wildcats based on the 416 Rigby case. The reason is because they are very similiar in case capacity to the 30-378 and in most cases, the Rigby cases are not designed to handle high pressure loads as they are designed for a load that drives a 400 gr 416 cal bullet to 2400 fps and thats it, this is with very mild pressure. Sure you can jump the pressure up but your case life will decrease dramatically. My 300 Allen Xpress is based on the 338 Lapua case. This capacity is actually quite a bit smaller then the 30-378 but I am getting some truely impressive performance out of it for one reason, the Lapua case will take dramatically more pressure then the Wby case and still have a good case life. In my 30" 300 AX, I started testing with the 208 gr A-Max and settled on a load that is producing 3420 fps. Yes, this is a high pressure load but bolt lift is effortless, extraction is great, no ejector mark on case head, no primer loosening and this by the way is not the highest load I tested. She pushed near 3500 fps before I decided that was enough. Just started to feel the primer pockets loosening and a bit of bolt resistance on that those loads. My point being, you do not have to go with a larger case all the time, the 300 AX has about 10 grains less volume then the rounds your talking about but it has a huge advantage in case strength and quality for that matter. In addition to that, cases are less costly then the Wby cases. Before you do anything however, shooting your 30-378 to see how it does is the smart thing to do. It may suprise you and you may well be happy with that level of performance and a factory chambering is much easier to deal with. Kirby Allen(50) [/QUOTE]
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Thinking of re-chambering my .30-.378....looking for more velocity
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