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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Throat erosion and double-based powders.
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<blockquote data-quote="Bart B" data-source="post: 635565" data-attributes="member: 5302"><p>One of the arsenals (Frankfort, I think) tested the .30-06 for accuracy and barrel life with IMR4064. That powder had better accuracy with the 150 gr. ball, 165-gr. AP and 172-gr. machine gun bullet (also the match bullet in M72 ammo). And about 10 to 15 percent longer barrel life. Problem was, IMR4064 had to be weighed for each charge. The high speed powder metering machines didn't throw charges uniform enough to meet velocity spread specs. So they continued using IMR4895 as the standard powder as it metered more uniform charge weights.</p><p></p><p>When the Garand started being used in competiton, IMR4064 was the powder of choice when handloading new cases for the same reasons; better accuracy and barrel life. If you resize fired cases from your Garand for reloading, you probably won't see any difference in accuracy.</p></blockquote><p></p>
[QUOTE="Bart B, post: 635565, member: 5302"] One of the arsenals (Frankfort, I think) tested the .30-06 for accuracy and barrel life with IMR4064. That powder had better accuracy with the 150 gr. ball, 165-gr. AP and 172-gr. machine gun bullet (also the match bullet in M72 ammo). And about 10 to 15 percent longer barrel life. Problem was, IMR4064 had to be weighed for each charge. The high speed powder metering machines didn't throw charges uniform enough to meet velocity spread specs. So they continued using IMR4895 as the standard powder as it metered more uniform charge weights. When the Garand started being used in competiton, IMR4064 was the powder of choice when handloading new cases for the same reasons; better accuracy and barrel life. If you resize fired cases from your Garand for reloading, you probably won't see any difference in accuracy. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Throat erosion and double-based powders.
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