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Rifles, Reloading, Optics, Equipment
Reloading
Load density to case capacity to consistent vel, es and sd?
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<blockquote data-quote="MagnumManiac" data-source="post: 1596372" data-attributes="member: 10755"><p>The 3 cartridges in question are the 300WM, 338 Edge and 338-416 Rigby Improved 40 degree. The powders have all been double base and regarded as very slow burn rate in each cartridge/bullet combo.</p><p>The powders are not that slow that an overload is not possible, but I also wouldn't drop charges below 5% of predicted max either. Hang fires are a real danger below 5% of max.</p><p>In one instance, I had the pressure trace show 2 maximum pressures. The second one, about 2 inches from the muzzle, was above 100,000psi. Something I had heard of but never encountered. This was with RE33 in the 338-416 and a 300gr Berger OTM. Only powder that did it and only with that bullet.</p><p>Obviously I stopped all testing with that combo and went to H50BMG/2218 here.</p><p>I use the 'swirl' because the packing scheme is always the same height in the case, and when it is compressed, the pressure on the bullet base is also the same. It has reduced my ES considerably and my SD has been very consistent with this method, single digits are possible with a well tuned load.</p><p></p><p>Hope this helps and answers your question.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 1596372, member: 10755"] The 3 cartridges in question are the 300WM, 338 Edge and 338-416 Rigby Improved 40 degree. The powders have all been double base and regarded as very slow burn rate in each cartridge/bullet combo. The powders are not that slow that an overload is not possible, but I also wouldn’t drop charges below 5% of predicted max either. Hang fires are a real danger below 5% of max. In one instance, I had the pressure trace show 2 maximum pressures. The second one, about 2 inches from the muzzle, was above 100,000psi. Something I had heard of but never encountered. This was with RE33 in the 338-416 and a 300gr Berger OTM. Only powder that did it and only with that bullet. Obviously I stopped all testing with that combo and went to H50BMG/2218 here. I use the ‘swirl’ because the packing scheme is always the same height in the case, and when it is compressed, the pressure on the bullet base is also the same. It has reduced my ES considerably and my SD has been very consistent with this method, single digits are possible with a well tuned load. Hope this helps and answers your question. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Load density to case capacity to consistent vel, es and sd?
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