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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
243 falling on it's face
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<blockquote data-quote="therifleman556" data-source="post: 1487833" data-attributes="member: 101898"><p>Hi all...</p><p>I recently started working up loads for the 107 matchkings and 75 grain V-MAXES using IMR 4831. I started within loading manual recommendations and found decent accuracy. I had not yet had a chance to chronograph anything though. Afterwards I had a chance to run them over the screens and was shocked to say the least. 41 grains under the 107s netted 2620 fps and 46 with the 75s barely broke 3000. I was expecting at least 2900 and 3400 respectively. This is out of a 24" 1-8" twist McGowan barrel that's currently got a little over 60 rounds through it.</p><p></p><p>Anybody run into a barrel that slow compared to published data? </p><p></p><p>Next step for me is to see where pressure is with this powder and just what it'll do.</p></blockquote><p></p>
[QUOTE="therifleman556, post: 1487833, member: 101898"] Hi all... I recently started working up loads for the 107 matchkings and 75 grain V-MAXES using IMR 4831. I started within loading manual recommendations and found decent accuracy. I had not yet had a chance to chronograph anything though. Afterwards I had a chance to run them over the screens and was shocked to say the least. 41 grains under the 107s netted 2620 fps and 46 with the 75s barely broke 3000. I was expecting at least 2900 and 3400 respectively. This is out of a 24" 1-8" twist McGowan barrel that's currently got a little over 60 rounds through it. Anybody run into a barrel that slow compared to published data? Next step for me is to see where pressure is with this powder and just what it'll do. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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243 falling on it's face
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