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Hunting
Extreme Long Range Hunting & Shooting (ELR)
30 378 weatherby
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<blockquote data-quote="yobuck" data-source="post: 2032343" data-attributes="member: 12443"><p>The late Howard Wolfe of Miflinburg Pa was one of the first to experiment with the 378 Wetherby case necked down to 30 cal.</p><p>In the 60s he designed a large 3 lug action specifically for that cartridge.</p><p>The long 36" barrels were dificult to come by back then as very few barrel makers made them.</p><p>The very best powder at that time was WW2 surplus H 570.</p><p>H 870 would also work, but required more of it in order to achieve the same velocity.</p><p>WC 872 is almost identicle to H 870 as for burn rate and it will work also.</p><p>For about 30 years i used a 36" barreled 30x378 on # 29 Wolfe action.</p><p>Howard recommended using the 200 gr SMK, with 112 or 113 gr of H570 which produced about 3500 fps from a 36" barrel in my gun. </p><p>On an average day from my 100 yd zero it took 145 clicks to get to 1500 yds.</p><p>My late friend Rich used WC 872 and he needed 118 gr to duplicate my velocity.</p><p>As for the BC factor, at 1500 yds, the 200 gr SMK outperformed the 220 SMK in my gun by several feet in elevation. And the 240 SMK was considerably further downhill if the same elevation was added in all cases.</p><p>So velocity does rule at least to some point.</p><p>And beyond that point its best to move on to a 338, and not just any 338 either.</p></blockquote><p></p>
[QUOTE="yobuck, post: 2032343, member: 12443"] The late Howard Wolfe of Miflinburg Pa was one of the first to experiment with the 378 Wetherby case necked down to 30 cal. In the 60s he designed a large 3 lug action specifically for that cartridge. The long 36” barrels were dificult to come by back then as very few barrel makers made them. The very best powder at that time was WW2 surplus H 570. H 870 would also work, but required more of it in order to achieve the same velocity. WC 872 is almost identicle to H 870 as for burn rate and it will work also. For about 30 years i used a 36” barreled 30x378 on # 29 Wolfe action. Howard recommended using the 200 gr SMK, with 112 or 113 gr of H570 which produced about 3500 fps from a 36” barrel in my gun. On an average day from my 100 yd zero it took 145 clicks to get to 1500 yds. My late friend Rich used WC 872 and he needed 118 gr to duplicate my velocity. As for the BC factor, at 1500 yds, the 200 gr SMK outperformed the 220 SMK in my gun by several feet in elevation. And the 240 SMK was considerably further downhill if the same elevation was added in all cases. So velocity does rule at least to some point. And beyond that point its best to move on to a 338, and not just any 338 either. [/QUOTE]
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Extreme Long Range Hunting & Shooting (ELR)
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