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Rifles, Reloading, Optics, Equipment
Reloading
300WSM - Sierra 180 gr Gamechanger Load Data?
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<blockquote data-quote="LoneTraveler" data-source="post: 2026061" data-attributes="member: 77249"><p>I have found with the 300 WSM that a powder in the IMR 4350 burn rate is easiest to work with. Can't get enough H4831 powder in case and make O.A.C.L. length for the magazine. </p><p>In 1994, When I got a Kimber Montana in 300 WSM, Load data was very scarce. I got data from Hornady, Speer and IMR Powder. Hornady On internet, Listed 66.5 gr. Max. for IMR 4350.</p><p>A local shooter with a 300 WSM discussed a load for IMR 4350 powder in development.</p><p>I sat and looked at all the data and came up with a load by luck on the first try.</p><p></p><p>300 WSM 180 Gr. 1994-5 </p><p>Case, New FL sized WW, Primer Win. LR Powder IMR 4350 65.0 (Sixty Five) Gr. Bullet SIERRA 180 Gr. Game King. O.A.C.L. 2.860. To run through rifle magazine. </p><p>Have changed primer to WW LRM, Since Win. changed to standard and magnum primers. </p><p>First 3 shot group was 5/8" at 100. Chronographs at around 2975 fps. 24" barrel. </p><p>Happy with performance for a 7 1/4 lb. 2.5X8 scoped rifle.</p></blockquote><p></p>
[QUOTE="LoneTraveler, post: 2026061, member: 77249"] I have found with the 300 WSM that a powder in the IMR 4350 burn rate is easiest to work with. Can't get enough H4831 powder in case and make O.A.C.L. length for the magazine. In 1994, When I got a Kimber Montana in 300 WSM, Load data was very scarce. I got data from Hornady, Speer and IMR Powder. Hornady On internet, Listed 66.5 gr. Max. for IMR 4350. A local shooter with a 300 WSM discussed a load for IMR 4350 powder in development. I sat and looked at all the data and came up with a load by luck on the first try. 300 WSM 180 Gr. 1994-5 Case, New FL sized WW, Primer Win. LR Powder IMR 4350 65.0 (Sixty Five) Gr. Bullet SIERRA 180 Gr. Game King. O.A.C.L. 2.860. To run through rifle magazine. Have changed primer to WW LRM, Since Win. changed to standard and magnum primers. First 3 shot group was 5/8" at 100. Chronographs at around 2975 fps. 24" barrel. Happy with performance for a 7 1/4 lb. 2.5X8 scoped rifle. [/QUOTE]
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300WSM - Sierra 180 gr Gamechanger Load Data?
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