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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
375 RUM and 350g SMK
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<blockquote data-quote="Will Gray" data-source="post: 1897877" data-attributes="member: 65116"><p>I have shot only three 350g SMKs in my 26" barrel 375 RUM. Hot load: 96g of IMR 4831 gave me 2866fps (minor indications of pressure) same load with 300g SGK gave me 2922 and with 105g of H1000 the velocity was 2908. going to build a 30" barrel and throat it a bit more. I would love to see a 350g SMK at 3000fps, might get there. All are showing <3/4" group. Will check for loose primers when I reload. I am using Norma 300RUM brass necked up to 338, 375 and 416: great brass. Retumbo, RE-33 or RE50 may be needed in a 30" barrel but I have 8lbs of H1000 so it will get a full ring out before buying other powder. Using Labradar for the velocity checks.</p></blockquote><p></p>
[QUOTE="Will Gray, post: 1897877, member: 65116"] I have shot only three 350g SMKs in my 26" barrel 375 RUM. Hot load: 96g of IMR 4831 gave me 2866fps (minor indications of pressure) same load with 300g SGK gave me 2922 and with 105g of H1000 the velocity was 2908. going to build a 30" barrel and throat it a bit more. I would love to see a 350g SMK at 3000fps, might get there. All are showing <3/4" group. Will check for loose primers when I reload. I am using Norma 300RUM brass necked up to 338, 375 and 416: great brass. Retumbo, RE-33 or RE50 may be needed in a 30" barrel but I have 8lbs of H1000 so it will get a full ring out before buying other powder. Using Labradar for the velocity checks. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
375 RUM and 350g SMK
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