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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
3200 fps-300 smk
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<blockquote data-quote="Fiftydriver" data-source="post: 379402" data-attributes="member: 10"><p>I have worked with this round alot, especially before I started working with my 338 AX. Its called the 338 Kubla Kahn, basically a 338-378 with conventional 35 degree shoulder angle.</p><p> </p><p>I shipped out several heavy rifles in this chamber and velocities varied from rifle to rifle but I would say that if your getting anywhere near 3200 fps, your pushing things pretty hard. I put a heavy rifle together for my Brother with a 36" Lilja and it would easily break 3150 fps but that was max and that was with a long throat.</p><p> </p><p>My personal 338 Kahn with the same bullet would get 3050 fps and then primer pockets would loosen.</p><p> </p><p>Now, these Lilja barrels were quite tight in bore diameter which does limit max velocity to some degree but to break 3200 fps with a 300 gr SMK I would say your really pushing the Wby case to hard.</p><p> </p><p>I talked with Dick Cassull several years ago after hearing that he was getting 3200 fps with his 338-416 Rigby improved which is nearly identical to the round your using. We talked it over for a while and then I asked what his case life was. He asked what was case life, he shot his brass and threw it away after usually after the first firing but always after the second because the primer pockets were blown.</p><p> </p><p>I would be curious how your primer pockets are doing, especially at +3200 fps.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 379402, member: 10"] I have worked with this round alot, especially before I started working with my 338 AX. Its called the 338 Kubla Kahn, basically a 338-378 with conventional 35 degree shoulder angle. I shipped out several heavy rifles in this chamber and velocities varied from rifle to rifle but I would say that if your getting anywhere near 3200 fps, your pushing things pretty hard. I put a heavy rifle together for my Brother with a 36" Lilja and it would easily break 3150 fps but that was max and that was with a long throat. My personal 338 Kahn with the same bullet would get 3050 fps and then primer pockets would loosen. Now, these Lilja barrels were quite tight in bore diameter which does limit max velocity to some degree but to break 3200 fps with a 300 gr SMK I would say your really pushing the Wby case to hard. I talked with Dick Cassull several years ago after hearing that he was getting 3200 fps with his 338-416 Rigby improved which is nearly identical to the round your using. We talked it over for a while and then I asked what his case life was. He asked what was case life, he shot his brass and threw it away after usually after the first firing but always after the second because the primer pockets were blown. I would be curious how your primer pockets are doing, especially at +3200 fps. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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