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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
375 wsm, 375 rem mag or 375 saum
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<blockquote data-quote="AZShooter" data-source="post: 3061370" data-attributes="member: 5219"><p>The 7 Rem mag necked up to 375 has been done. The chambering often called the 375 Taylor aka 375/338 win mag. Very easy to make by necking up 338 win mag brass. Can be loaded to shoot a 300 gr bullet as fast as 2490 fps. Shoots the 260 accubond up to 2775 fps. This is close to 375 H and H performance. It can also be loaded down due to the cartridge's small size. Powders like Varget and RL-15 work well in this chambering.</p><p></p><p> </p><p>I had an Interarms Mark X with a 21" douglas barrel and a McMillan stock. Suggested to my gunsmith to first use a 338 Win mag reamer followed by a 375 H and H reamer. It worked and made a good chamber. </p><p></p><p>While I used it to Kill two elk with a 260 gr accubond @ 2775 fps, I developed a few other loads:</p><p> </p><p></p><p>64 gr of varget, 300 sierra, vel 2490 </p><p>59 gr of RL-15, 260 accubond, vel 2325</p><p>66 gr of RL-15, 260 accubond, vel 2675 KO FACTOR 37</p><p>68 gr of RL-15, 260 accubond, vel 2775 (max in my rifles)</p><p>75 gr of RL-15, 235 TSX, vel 2990</p><p>235 Speer, 72 gr H4831, vel 2325</p><p>220 gr hornady flat nose 70 gr of Varget 2770 fps </p><p></p><p>I bought a basic two die set from Redding.</p><p></p><p>Good luck with your project with whatever chambering you use.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 3061370, member: 5219"] The 7 Rem mag necked up to 375 has been done. The chambering often called the 375 Taylor aka 375/338 win mag. Very easy to make by necking up 338 win mag brass. Can be loaded to shoot a 300 gr bullet as fast as 2490 fps. Shoots the 260 accubond up to 2775 fps. This is close to 375 H and H performance. It can also be loaded down due to the cartridge's small size. Powders like Varget and RL-15 work well in this chambering. [I] [/I] I had an Interarms Mark X with a 21" douglas barrel and a McMillan stock. Suggested to my gunsmith to first use a 338 Win mag reamer followed by a 375 H and H reamer. It worked and made a good chamber. While I used it to Kill two elk with a 260 gr accubond @ 2775 fps, I developed a few other loads: 64 gr of varget, 300 sierra, vel 2490 59 gr of RL-15, 260 accubond, vel 2325 66 gr of RL-15, 260 accubond, vel 2675 KO FACTOR 37 68 gr of RL-15, 260 accubond, vel 2775 (max in my rifles) 75 gr of RL-15, 235 TSX, vel 2990 235 Speer, 72 gr H4831, vel 2325 220 gr hornady flat nose 70 gr of Varget 2770 fps I bought a basic two die set from Redding. Good luck with your project with whatever chambering you use. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
375 wsm, 375 rem mag or 375 saum
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