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Rifles, Reloading, Optics, Equipment
Gunsmithing
458 Short mag
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<blockquote data-quote="J E Custom" data-source="post: 1887994" data-attributes="member: 2736"><p>This is not a "true short mag" in the sense it will function in a short action, but it is a shortened 458 Win mag, but it is a real thumper with 400 or 500 grain bullets.</p><p></p><p>The purpose of this cartridge was to find/build something that could easily match or exceed the 45/70 Gov in a modern designed cartridge/case in a rimless case. 2,000 to 2250 ft/sec with a 400 grain bullet was the goal. I have loaded 45/70 hard in modern rifles and the cases suffered. </p><p></p><p>The 458 win mag is a hand full for many shooters, so a shortened version solved this problem. The case is 2.375 instead of 2.500 like the 458 win mag. it will easily top 2,000 ft/sec and can be shot in a 458 win mag but the 458 win mag will not chamber in the 458 short mag. it also lower the chances of a squib load at reduced velocities.</p><p></p><p>The friend I built it for really likes it and the performance will almost match the 458 win mag if so desired. He prefers to shoot 350 to 400 grain bullets in it and says the recoil is noticeably less than his 458 win mag. he also has a 45/70 and says it is like a 45/70 on steroids, but is very easy on the brass. (Trimmed 458 cases). it has become his favorite hog gun. It also opens up a new batch of powders because of the reduced case volume.</p><p></p><p>He said than 2000 to 2100 are the range he loads to and likes the combination best. He also uses his standard 458 win mag dies with great success and ease. Muzzle energy is a conservative 4,000 ft/lbs</p><p></p><p>Just something to fill a niche between the two cartridges.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1887994, member: 2736"] This is not a "true short mag" in the sense it will function in a short action, but it is a shortened 458 Win mag, but it is a real thumper with 400 or 500 grain bullets. The purpose of this cartridge was to find/build something that could easily match or exceed the 45/70 Gov in a modern designed cartridge/case in a rimless case. 2,000 to 2250 ft/sec with a 400 grain bullet was the goal. I have loaded 45/70 hard in modern rifles and the cases suffered. The 458 win mag is a hand full for many shooters, so a shortened version solved this problem. The case is 2.375 instead of 2.500 like the 458 win mag. it will easily top 2,000 ft/sec and can be shot in a 458 win mag but the 458 win mag will not chamber in the 458 short mag. it also lower the chances of a squib load at reduced velocities. The friend I built it for really likes it and the performance will almost match the 458 win mag if so desired. He prefers to shoot 350 to 400 grain bullets in it and says the recoil is noticeably less than his 458 win mag. he also has a 45/70 and says it is like a 45/70 on steroids, but is very easy on the brass. (Trimmed 458 cases). it has become his favorite hog gun. It also opens up a new batch of powders because of the reduced case volume. He said than 2000 to 2100 are the range he loads to and likes the combination best. He also uses his standard 458 win mag dies with great success and ease. Muzzle energy is a conservative 4,000 ft/lbs Just something to fill a niche between the two cartridges. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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458 Short mag
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