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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Velocity swing in 7mm wsm with IMR 7828ssc
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<blockquote data-quote="Hiwayman92" data-source="post: 1166238" data-attributes="member: 85098"><p>I took all the advice you guys gave, and shot again today. 64 grains of IMR 7828 SSC and able 175's averaged 2968, no pressure signs, loaded at 3.115". More importantly the S.D. was 15 and it grouped 3 in one ragged clover leaf.</p><p></p><p>I shot some H1000 loads as well, and the S.D. was 12 and 6.65. Respectively for 68 and 69 grains. (2,991 and 3037 fps.) THESE GROUPS WERE ABOUT 1" or less, but I haven't played with seating depth. </p><p></p><p>68 grains of IMR 7977 at 2951with an s.d. of 12 grouped about 1 inch also.</p><p></p><p>I can't believe I haven't flattened a primer yet, but I guess the long throat keeps pressure down... I'm thinking I need a ladder test on H1000, IMR7828SSC, and IMR 7977... or I keep the 7828ssc load and roll with it? Advice?</p></blockquote><p></p>
[QUOTE="Hiwayman92, post: 1166238, member: 85098"] I took all the advice you guys gave, and shot again today. 64 grains of IMR 7828 SSC and able 175's averaged 2968, no pressure signs, loaded at 3.115". More importantly the S.D. was 15 and it grouped 3 in one ragged clover leaf. I shot some H1000 loads as well, and the S.D. was 12 and 6.65. Respectively for 68 and 69 grains. (2,991 and 3037 fps.) THESE GROUPS WERE ABOUT 1" or less, but I haven't played with seating depth. 68 grains of IMR 7977 at 2951with an s.d. of 12 grouped about 1 inch also. I can't believe I haven't flattened a primer yet, but I guess the long throat keeps pressure down... I'm thinking I need a ladder test on H1000, IMR7828SSC, and IMR 7977... or I keep the 7828ssc load and roll with it? Advice? [/QUOTE]
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Velocity swing in 7mm wsm with IMR 7828ssc
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