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Rifles, Reloading, Optics, Equipment
Reloading
Temperature sensitive powder?
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<blockquote data-quote="Onager" data-source="post: 484188" data-attributes="member: 25965"><p>No where near the experience you guys have but here is my experience with RL22 and two 300 RUM</p><p>My brother and nephew asked me to work up the a load that would work in both Remington 700s using this powder. They also hoped I could find the same load that was interchangable in both guns. Riiiiiight.</p><p> Surprisingly, much easier than I thought. One is a standard 700 in a glass bedded laminated stock. The other is a heavy fluted barrel in a expensive pillar bedded synthetic stock. Barrels broken in on both. Each of the guns supposedly hated factory ammo. </p><p> I used 180 gr Barnes TTsx bullets. I found that 87 grains of Rl 22 gave the best accuracy. I avoided pushing the load over 87.5 grains because, of the temp. sensitivity fear and they aren't my guns.</p><p>Fired all groups at 300 yards.</p><p>The one day the temp was in the 80s and I had "cooked" the rounds in my car all day. Can't remember the velocity average at the moment. Groups were 0.5 moa(great for me). No pressure signs but velocity was a bit higher than my goal.</p><p> This winter I completed the project. Temperatures were in the 30s to high of 40 degrees F.</p><p>Excellent groups again but the one group poi was 3 1/2 inches lower in the cooler weather. No horizontal deviation. The velocities averaged 150 fps less. In my brothers gun the poi was 3 inches lower in the cooler weather. With an average loss in velocity of 125 fps. </p><p>They are happy that the 87 grains works in both guns and they got much better accuracy.</p><p>My take away is that "pressure sensitive" powders can/do give good accuracy but I will not push the velocity to the upper limits.</p></blockquote><p></p>
[QUOTE="Onager, post: 484188, member: 25965"] No where near the experience you guys have but here is my experience with RL22 and two 300 RUM My brother and nephew asked me to work up the a load that would work in both Remington 700s using this powder. They also hoped I could find the same load that was interchangable in both guns. Riiiiiight. Surprisingly, much easier than I thought. One is a standard 700 in a glass bedded laminated stock. The other is a heavy fluted barrel in a expensive pillar bedded synthetic stock. Barrels broken in on both. Each of the guns supposedly hated factory ammo. I used 180 gr Barnes TTsx bullets. I found that 87 grains of Rl 22 gave the best accuracy. I avoided pushing the load over 87.5 grains because, of the temp. sensitivity fear and they aren't my guns. Fired all groups at 300 yards. The one day the temp was in the 80s and I had "cooked" the rounds in my car all day. Can't remember the velocity average at the moment. Groups were 0.5 moa(great for me). No pressure signs but velocity was a bit higher than my goal. This winter I completed the project. Temperatures were in the 30s to high of 40 degrees F. Excellent groups again but the one group poi was 3 1/2 inches lower in the cooler weather. No horizontal deviation. The velocities averaged 150 fps less. In my brothers gun the poi was 3 inches lower in the cooler weather. With an average loss in velocity of 125 fps. They are happy that the 87 grains works in both guns and they got much better accuracy. My take away is that "pressure sensitive" powders can/do give good accuracy but I will not push the velocity to the upper limits. [/QUOTE]
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Temperature sensitive powder?
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