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Rifles, Reloading, Optics, Equipment
Reloading
Ugly extreme spread........now what ?
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<blockquote data-quote="Dean2" data-source="post: 1674331" data-attributes="member: 26077"><p>Yes I have seen it in real life. I do a lot of shooting, most years at least 5000 rounds of center fire, but it is almost all in aide of developing top notch loads and being a better shot for hunting. Heavy recoiling cartridges like the 7 and 300 RUM, the bullets on the rounds in the mag will push back into the case if you only have 2 thou neck tension. I have even seen this happen in 308 in a light gun. The change in COAL has a far bigger effect on accuracy than a slightly larger ES.</p><p></p><p>The big ES effect with too light a neck tension is easiest to see in really small cases like the 22 H. Shoot a regular load with a mag primer, standard primer and SP primer. You will see a huge difference in ES. If you take and lightly crimp the load with the Mag primer, the ES comes right back down. Same thing happens with larger cases, just not to the same degree and many people never test regular, mag and BR primers in the exact same load so they never see the effect clearly.</p><p></p><p>We also load all of our hunting ammo with magnum primers for that extra bit of assurance when it gets to -40. I know that lighter primers might garner slightly better groups but I will give up a little for the reliable ignition. We use CCI 250 to 65 grains and Fed 215 for anything the uses more powder than that because we have seen lots of click booms or failures to fire, even in warm weather, using CCI 250 in cases running 75-115 grains of powder.</p><p></p><p>I hunt a lot and all over the world. To me there is a real big difference between developing hunting loads and pure target loads. Hunting loads need to be 100% reliable and as impervious to recoil, transport, temperature fluctuations, rain, snow and the like as possible. I am not saying your loading techniques are not better for pure accuracy, I am just giving my experience with respect to loads that are being developed for use under the extreme conditions often encountered when hunting.</p><p></p><p>I don't usually post so many times on one threat but I think this topic is very important. I have seen more than a few failures of hand loaded ammunition in hunting scenarios, both by other hunters and from clients when I used to guide and a lot of it can be traced back to loading for maximum accuracy on targets. Cases that fail to feed smoothly or at all, cases that stick due to over pressure in heat, failures to fire in extreme cold, broken extractors or firing pins from blown primers or split cases, and bullets that fail to perform on game because they were chosen for max accuracy rather than max performance on flesh. It happens often enough that I believe it is a real problem, not bad enough to recommend factory ammo for hunting but definitely common enough to say that a lot of guys need to pay way more attention to reliability and on game performance of their hunting loads.</p></blockquote><p></p>
[QUOTE="Dean2, post: 1674331, member: 26077"] Yes I have seen it in real life. I do a lot of shooting, most years at least 5000 rounds of center fire, but it is almost all in aide of developing top notch loads and being a better shot for hunting. Heavy recoiling cartridges like the 7 and 300 RUM, the bullets on the rounds in the mag will push back into the case if you only have 2 thou neck tension. I have even seen this happen in 308 in a light gun. The change in COAL has a far bigger effect on accuracy than a slightly larger ES. The big ES effect with too light a neck tension is easiest to see in really small cases like the 22 H. Shoot a regular load with a mag primer, standard primer and SP primer. You will see a huge difference in ES. If you take and lightly crimp the load with the Mag primer, the ES comes right back down. Same thing happens with larger cases, just not to the same degree and many people never test regular, mag and BR primers in the exact same load so they never see the effect clearly. We also load all of our hunting ammo with magnum primers for that extra bit of assurance when it gets to -40. I know that lighter primers might garner slightly better groups but I will give up a little for the reliable ignition. We use CCI 250 to 65 grains and Fed 215 for anything the uses more powder than that because we have seen lots of click booms or failures to fire, even in warm weather, using CCI 250 in cases running 75-115 grains of powder. I hunt a lot and all over the world. To me there is a real big difference between developing hunting loads and pure target loads. Hunting loads need to be 100% reliable and as impervious to recoil, transport, temperature fluctuations, rain, snow and the like as possible. I am not saying your loading techniques are not better for pure accuracy, I am just giving my experience with respect to loads that are being developed for use under the extreme conditions often encountered when hunting. I don't usually post so many times on one threat but I think this topic is very important. I have seen more than a few failures of hand loaded ammunition in hunting scenarios, both by other hunters and from clients when I used to guide and a lot of it can be traced back to loading for maximum accuracy on targets. Cases that fail to feed smoothly or at all, cases that stick due to over pressure in heat, failures to fire in extreme cold, broken extractors or firing pins from blown primers or split cases, and bullets that fail to perform on game because they were chosen for max accuracy rather than max performance on flesh. It happens often enough that I believe it is a real problem, not bad enough to recommend factory ammo for hunting but definitely common enough to say that a lot of guys need to pay way more attention to reliability and on game performance of their hunting loads. [/QUOTE]
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Ugly extreme spread........now what ?
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