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MY NEW BULLET SORTING COMPARTOR

Very interesting points on where the seating stem puts the bullet when seating, compared to the ojive-lands contact. Thinking back on a older thread where Bart said to sort by bullet over all length, is starting to soak in.
 
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Then I heard several top competitive shooters talk about how they'd do there load development and once their seating depth was found for their load, they would change it for the life of the barrel to maintain their accuracy. How can that be if "optimum jump" is so important? If they're keeping the their seating depth fixed as the throat erodes, the jump becomes longer and longer over the life of the barrel, yet their cartridge remains good.
In the sentence above, did you mean "...they would NOT change it for the life of the barrel..."

Thanks!
Alex
 
I think you will find that the Holland tool used by Sierra, has tapered holes...I tried to measure it and it sure appears to have a taper.
 

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