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Rifles, Reloading, Optics, Equipment
Reloading
Seating Depth Testing
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<blockquote data-quote="Okanogan" data-source="post: 1904210" data-attributes="member: 90397"><p>The PRB series was very interesting. One of the things I saw pointed out elsewhere is that a lot (not all) the referenced testing was using Berger Hybrid type bullets. </p><p></p><p>I'm starting in with initial load development for a new 6.5 SAUM and was kind of surprised at the amount of difference that bullet selection/ shape makes for seating depth. I was going to try and load 143 ELDXs out to 0.100" off the lands but in my rifle that far off the lands would have put the bearing surface very close to or below the case mouth. In comparison, to Berger 140 gr Elite Hunters, the ELDXs had to be seated almost 0.200" deeper to keep them out of the lands. I went ahead and tried all the way out to 0.070 off the lands with the ELDX but ended up with the better groups around 0.040. Overall, I was not impressed with the ELDX in the new rifle which is kind of what I had expected after seeing how far they had to be seated into the case. I'm more hopeful future testing with the Bergers will fair better.</p><p></p><p>I think a good place to start load development might be with the Wheeler test for different bullets in your rifle before doing any reloading or shooting. If the bullet ends up sitting too deep or exceeds your mag length, it might just be better to pick a different bullet to work with from the start.</p></blockquote><p></p>
[QUOTE="Okanogan, post: 1904210, member: 90397"] The PRB series was very interesting. One of the things I saw pointed out elsewhere is that a lot (not all) the referenced testing was using Berger Hybrid type bullets. I'm starting in with initial load development for a new 6.5 SAUM and was kind of surprised at the amount of difference that bullet selection/ shape makes for seating depth. I was going to try and load 143 ELDXs out to 0.100" off the lands but in my rifle that far off the lands would have put the bearing surface very close to or below the case mouth. In comparison, to Berger 140 gr Elite Hunters, the ELDXs had to be seated almost 0.200" deeper to keep them out of the lands. I went ahead and tried all the way out to 0.070 off the lands with the ELDX but ended up with the better groups around 0.040. Overall, I was not impressed with the ELDX in the new rifle which is kind of what I had expected after seeing how far they had to be seated into the case. I'm more hopeful future testing with the Bergers will fair better. I think a good place to start load development might be with the Wheeler test for different bullets in your rifle before doing any reloading or shooting. If the bullet ends up sitting too deep or exceeds your mag length, it might just be better to pick a different bullet to work with from the start. [/QUOTE]
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Seating Depth Testing
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