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Rifles, Reloading, Optics, Equipment
Reloading
.277 accubonds
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<blockquote data-quote="Dr. Vette" data-source="post: 901024" data-attributes="member: 22335"><p>Yep.</p><p></p><p>I use the Hornady comparator and Redding micrometer seaters.</p><p></p><p>I generally load all rounds of one batch a bit long, then use my calipers + comparator to measure each cartridge at this point. I then note how far from my goal length the cartridge is, adjust the micrometer on the seater die, and finish seating the round. I then move on to the next one, but don't forget to back out the micrometer between each one. </p><p></p><p>Some bullets vary more than others, and you'll note this by the variance in the amount you need to adjust the micrometer for each round. I have found that some bullets are much more consistent than others.</p><p></p><p>Here is a copy of a post I made on another forum:</p><p></p><p>See photos below.</p><p></p><p>First, install comparator with the correct caliber insert on your calipers, and zero it out.</p><p>Next, note the two cartridges, one with a Sierra bullet and one with a Berger, both are 7mm Wby.</p><p>Now see how the distance to the ogive (CartridgeBaseToOgive or LengthToOgive) differ between them. This is just for examples so you see that different bullet shapes result in different CBTO/LTO measurements.</p><p></p><p>Your goal when loading is to the the CBTO/LTO measurement to be exactly the same for each round.</p></blockquote><p></p>
[QUOTE="Dr. Vette, post: 901024, member: 22335"] Yep. I use the Hornady comparator and Redding micrometer seaters. I generally load all rounds of one batch a bit long, then use my calipers + comparator to measure each cartridge at this point. I then note how far from my goal length the cartridge is, adjust the micrometer on the seater die, and finish seating the round. I then move on to the next one, but don't forget to back out the micrometer between each one. Some bullets vary more than others, and you'll note this by the variance in the amount you need to adjust the micrometer for each round. I have found that some bullets are much more consistent than others. Here is a copy of a post I made on another forum: See photos below. First, install comparator with the correct caliber insert on your calipers, and zero it out. Next, note the two cartridges, one with a Sierra bullet and one with a Berger, both are 7mm Wby. Now see how the distance to the ogive (CartridgeBaseToOgive or LengthToOgive) differ between them. This is just for examples so you see that different bullet shapes result in different CBTO/LTO measurements. Your goal when loading is to the the CBTO/LTO measurement to be exactly the same for each round. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
.277 accubonds
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