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Rifles, Reloading, Optics, Equipment
Reloading
8133 or retumbo
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<blockquote data-quote="7mmTikkaShooter" data-source="post: 1580250" data-attributes="member: 92915"><p>I've used both Retumbo and 8133 in my 7mm. In my experience the velocities seemed very similar but I could get a little more out of the 8133 before pressure signs. In general I've heard that the double base powders used for temp stability are generally dirtier so this might be a mute point, but contrary to what several others have written, I have found that 8133 shot <em><strong>cleaner</strong></em> than Retumbo. Kind of strange. It's through a chrome-moly tube, so I'm wondering if those who saw Retumbo shoot cleaner, stainless barrels or chrome-moly? Might be a new thread I'll have to start. Either one shot great with very similar velocities around the accuracy node. Both also similar in temp stability as far as I can tell. Could be splitting hairs with these two powders, but for what its worth I personally have moved from Retumbo to IMR 8133.</p></blockquote><p></p>
[QUOTE="7mmTikkaShooter, post: 1580250, member: 92915"] I've used both Retumbo and 8133 in my 7mm. In my experience the velocities seemed very similar but I could get a little more out of the 8133 before pressure signs. In general I've heard that the double base powders used for temp stability are generally dirtier so this might be a mute point, but contrary to what several others have written, I have found that 8133 shot [I][B]cleaner[/B][/I] than Retumbo. Kind of strange. It's through a chrome-moly tube, so I'm wondering if those who saw Retumbo shoot cleaner, stainless barrels or chrome-moly? Might be a new thread I'll have to start. Either one shot great with very similar velocities around the accuracy node. Both also similar in temp stability as far as I can tell. Could be splitting hairs with these two powders, but for what its worth I personally have moved from Retumbo to IMR 8133. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
8133 or retumbo
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