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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
More range testing with 338 Allen Magnum XHS rifle....
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<blockquote data-quote="Aragorn50" data-source="post: 155759" data-attributes="member: 8024"><p>[ QUOTE ]</p><p>Kirby,</p><p></p><p> Thanks for the insight, I'll try to remember that before I post in the future.</p><p></p><p> On the subject of barrel life, and maybe you've addressed this in the past, have you found that sherical double-based (hotter but less abrasive) or extruded (cooler but more abrasive) powders effect throat erosion to a greater degree? In other words, does one erode the throat faster than the other?</p><p></p><p>Festus </p><p></p><p>[/ QUOTE ]</p><p></p><p></p><p>Festus,</p><p></p><p>I was always of the understanding that Ball powders were "cooler" burning and that extruded powders tended to burn "hotter." The military tends to spec extruded powders for tracer rounds for this reason. W872 tends to burn "dirtier" as it has a higher graphite content. Any other info on this?</p><p></p><p>Kirby- The next issue of the VHP will have 3 separate tests of the US869, which demonstrates that it is also temperature sensitive in the BMG case as well. In the BMG loads were running similar to VV20N29, which is slower than the H50BMG. Difference of case volume and bore diameter I guess.</p><p></p><p>Scott Nye</p></blockquote><p></p>
[QUOTE="Aragorn50, post: 155759, member: 8024"] [ QUOTE ] Kirby, Thanks for the insight, I'll try to remember that before I post in the future. On the subject of barrel life, and maybe you've addressed this in the past, have you found that sherical double-based (hotter but less abrasive) or extruded (cooler but more abrasive) powders effect throat erosion to a greater degree? In other words, does one erode the throat faster than the other? Festus [/ QUOTE ] Festus, I was always of the understanding that Ball powders were "cooler" burning and that extruded powders tended to burn "hotter." The military tends to spec extruded powders for tracer rounds for this reason. W872 tends to burn "dirtier" as it has a higher graphite content. Any other info on this? Kirby- The next issue of the VHP will have 3 separate tests of the US869, which demonstrates that it is also temperature sensitive in the BMG case as well. In the BMG loads were running similar to VV20N29, which is slower than the H50BMG. Difference of case volume and bore diameter I guess. Scott Nye [/QUOTE]
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More range testing with 338 Allen Magnum XHS rifle....
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