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Factory Match 108Eldm Findings

CJS-6.5

Full auto flintlock user.
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Minuteman
Sep 15, 2017
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Been loading for my 6mm Creed and also shooting some factory ammo. Been pretty happy with the accuracy from the factory ammo, so decided to check it out. I have 2 different lots. Here's highest and lowest total weight from the first lot. Pretty crazy.
 

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Pulled the bullets from both cases. The lighter cartridge had a bullet weighing 108.3 gns and 40.3 gns of powder while the brass with primer weighed 154.9 gns. The heavy cartridge had a bullet weighing 108.5 grns and 40.3 grns powder while the brass with primer weighed 157 gns. So it's the brass that is inconsistent.
 
Hard to tell for sure what the powder is. Here's H4350 on the right next to it.
 

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When I loaded them back up to factory 2.235 to ogive I was surprised at how easy they seated. Hardly any neck tension.
 
The second lot had a high cartridge weight of 309 and a low of 305.9. The heavier one had 40 grns of powder and a 108.3 grn bullet with 160.7 brass. The lighter one has 40.1 grns powder with a 108.1 grn bullet and 157.7 grn brass. So bullets and powder is fairly consistent with a lot to lot dispersion of 154.9 to 160.7 brass weight.
 
It's probably a proprietary powder that isn't available to consumers. Hornady used to load their 6.5 Creedmoor AMAX rounds with H4350, but they switched to a different powder years ago and I'd bet it's the same powder in your 6 Creed loads.
 
It's just interesting to me that for years I've been careful about brass and yet the factory stuff is horribly inconsistent yet shoots well under moa.