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Rifles, Reloading, Optics, Equipment
Reloading
Temp sensitive?
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<blockquote data-quote="Dean2" data-source="post: 1895699" data-attributes="member: 26077"><p>Despite some of the posts on here, there really are differences between temp stable powder and others. Here we shoot from 95 F to -40 F. You can see some pretty loopy things from powder and primers at -40 and even at 0. For instance, I never use CCI 250 in loads over 75 grains because they just aren't hot enough to provide reliable ignition. In many different guns we have got click booms and failure to fires, even though the powder was part burned and clumpy in the cases. Temp stable powder is more difficult to ignite. The big boomers get Fed 215 or Win Mag primers. The Fed 215 was custom developed for Roy Weatherby for the 378 and 460 Bee cartridge due to their very large powder loads.</p><p></p><p>My suggestion, stick to the temp stable powders, I no longer use RL powders because they tend to be temp sensitive but just as important, the supply is not consistent. We use a lot of Hodgdon powders, develop our loads in the summer, test group them just before hunting season starts and again in the dead of winter. WE rarely have had to tweak them but we also focus on load nodes where a .5-1.5 grain powder difference doesn't make much difference to group size during the initial ladder tests. Temp stable powder, the right COAL and as wide a node near top velocity as you can find are your best bets for avoiding temperature induced POI and consistency issues.</p></blockquote><p></p>
[QUOTE="Dean2, post: 1895699, member: 26077"] Despite some of the posts on here, there really are differences between temp stable powder and others. Here we shoot from 95 F to -40 F. You can see some pretty loopy things from powder and primers at -40 and even at 0. For instance, I never use CCI 250 in loads over 75 grains because they just aren't hot enough to provide reliable ignition. In many different guns we have got click booms and failure to fires, even though the powder was part burned and clumpy in the cases. Temp stable powder is more difficult to ignite. The big boomers get Fed 215 or Win Mag primers. The Fed 215 was custom developed for Roy Weatherby for the 378 and 460 Bee cartridge due to their very large powder loads. My suggestion, stick to the temp stable powders, I no longer use RL powders because they tend to be temp sensitive but just as important, the supply is not consistent. We use a lot of Hodgdon powders, develop our loads in the summer, test group them just before hunting season starts and again in the dead of winter. WE rarely have had to tweak them but we also focus on load nodes where a .5-1.5 grain powder difference doesn't make much difference to group size during the initial ladder tests. Temp stable powder, the right COAL and as wide a node near top velocity as you can find are your best bets for avoiding temperature induced POI and consistency issues. [/QUOTE]
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Reloading
Temp sensitive?
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