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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
New Beast from Allen Precision Shooting!!!
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<blockquote data-quote="Fiftydriver" data-source="post: 1632922" data-attributes="member: 10"><p>Believe its just a percentages thing. Variations in powder chargers will make a much more significant difference in the smaller capacity cartridges simply because they make a higher % of variation in the smaller case. I would not say the larger capacity rounds are more STABLE. I would also say that in an 06, RL26 is pretty slow in burn rate. Something like RL19 or H4350 would likely be a better fit in my opinion. That may be the issue. I would think it would be difficult to get into the top 10% working pressures with RL26 in an 06 and that likely may be why your having consistency issues.</p><p></p><p>Modern smokeless powder, from what i have seen, burns most consistently at near top working pressures. Also burns much more completely, more efficiently and cleanly. </p><p></p><p>That said, in very low expansion ratio designs, you will see dramatically more effect from temp, environmental conditions and even bore temp. Even different twist rates can show measurable changes in chamber pressures with very low expansion ratio designs which will result in POI shifts at long range. </p><p></p><p>For example minute changes to these conditions make much more measurable difference in my 7mm Allen Magnum then they do in say a 280 rem.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 1632922, member: 10"] Believe its just a percentages thing. Variations in powder chargers will make a much more significant difference in the smaller capacity cartridges simply because they make a higher % of variation in the smaller case. I would not say the larger capacity rounds are more STABLE. I would also say that in an 06, RL26 is pretty slow in burn rate. Something like RL19 or H4350 would likely be a better fit in my opinion. That may be the issue. I would think it would be difficult to get into the top 10% working pressures with RL26 in an 06 and that likely may be why your having consistency issues. Modern smokeless powder, from what i have seen, burns most consistently at near top working pressures. Also burns much more completely, more efficiently and cleanly. That said, in very low expansion ratio designs, you will see dramatically more effect from temp, environmental conditions and even bore temp. Even different twist rates can show measurable changes in chamber pressures with very low expansion ratio designs which will result in POI shifts at long range. For example minute changes to these conditions make much more measurable difference in my 7mm Allen Magnum then they do in say a 280 rem. [/QUOTE]
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New Beast from Allen Precision Shooting!!!
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