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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 Snipe-Tac - Load Evaluation Wanted
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<blockquote data-quote="JeffVN" data-source="post: 212287" data-attributes="member: 2261"><p>I'm not surprised that your second effort was not as sucessful as your first when shooting your load development. I personally find that to be the rule and not the exception - at least for me. I agree that moving your entire rig to keep it in the shade is more effort then will prove productive. If you want shade that bad, bring an umbrella to the range and set it up to cover the barreled action (keeping the ammo in the shade is far more improtant then keeping the barrel in the shade. Additionally, you don't want to chamber a round and then let it cook in a hot chamber any longer then necessary in regular circumstances, but especailly when doing load development (I'm talking cooking it 20-30 seconds, not 3-5 seconds).</p><p></p><p>I'll hazzard a guess that the 50BMG powder is one of Hodgden's Extreme Powders, so its probably going to be fairly consistent as far as temp swings go. That having been said, I'm always nervous developing a load in the spring that I intend to shoot in the summer. </p><p></p><p>I learned this lesson in Houston when developing a 6.5x284 load in March (45 degrees 35% humidity)for use in June (95 degress with 75% humidity) and had heavy bolt lift and primers popping all over the place - nasty. Same story for the load that I developed and shot for F-Class in my 7WSM last December, January, and February in Vegas. That load is now shooting like crap at 110 degress in the Las Vegas desert, so I get to develop something to use in the summer. </p><p></p><p>I suspect that the lighter load (136-138 grain) will work its way up towards if not above 3,200 fps at 80 degrees, and may well be the one to consider for your load.</p><p></p><p>just a thought.....</p><p></p><p></p><p>JeffVN</p></blockquote><p></p>
[QUOTE="JeffVN, post: 212287, member: 2261"] I'm not surprised that your second effort was not as sucessful as your first when shooting your load development. I personally find that to be the rule and not the exception - at least for me. I agree that moving your entire rig to keep it in the shade is more effort then will prove productive. If you want shade that bad, bring an umbrella to the range and set it up to cover the barreled action (keeping the ammo in the shade is far more improtant then keeping the barrel in the shade. Additionally, you don't want to chamber a round and then let it cook in a hot chamber any longer then necessary in regular circumstances, but especailly when doing load development (I'm talking cooking it 20-30 seconds, not 3-5 seconds). I'll hazzard a guess that the 50BMG powder is one of Hodgden's Extreme Powders, so its probably going to be fairly consistent as far as temp swings go. That having been said, I'm always nervous developing a load in the spring that I intend to shoot in the summer. I learned this lesson in Houston when developing a 6.5x284 load in March (45 degrees 35% humidity)for use in June (95 degress with 75% humidity) and had heavy bolt lift and primers popping all over the place - nasty. Same story for the load that I developed and shot for F-Class in my 7WSM last December, January, and February in Vegas. That load is now shooting like crap at 110 degress in the Las Vegas desert, so I get to develop something to use in the summer. I suspect that the lighter load (136-138 grain) will work its way up towards if not above 3,200 fps at 80 degrees, and may well be the one to consider for your load. just a thought..... JeffVN [/QUOTE]
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338 Snipe-Tac - Load Evaluation Wanted
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