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Rifles, Reloading, Optics, Equipment
Reloading
Pulling bullets / Reseating / Neck Tension
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<blockquote data-quote="eshorebwhntr" data-source="post: 811968" data-attributes="member: 17112"><p>Finally a post in the reloading section with some intelligent discussion and factual data to back it up. Great info.</p><p> </p><p>Just wanted to add as a side note a finding that I had a few weeks ago in regard to neck sizing.</p><p> </p><p>I've got a custom chamber STW by Gre-Tan. It was cut with a .313 neck based on the dummy cartridge I sent with Remington brass. Now that there is short supply of that brass and since I had heard many good things about Norma I fire-formed some for my rifle from 300 H&H brass a while back. Once loaded up the neck diameter with the norma brass is only .310, so .003 clearance as opposed to a tight fit with the Remington.</p><p> </p><p>So far I've only been able to shoot at 100 yards for comparison but there is a fall off in accuracy with the Norma brass. It's not much, but it is noticeable. This gun would consistently cut one hole at that range and now its more like a clover leaf. I still need to continue with load development but so far that is what I've found. I also noticed a higher spread in velocity as well. Both probably deserve more testing at this stage but I thought it was worth sharing.</p><p> </p><p>Another note...if you start out wondering what size bushing to use don't try to mic the wall thickness and double it to calculate the bushing diameter. Find a way to size it down enough to get a tight fit on the bullet and mic the neck of a loaded round. Much more accurate and gets you the correct bushing the first time. I learned the hard way, hopefully someone else reads this down the road and it saves them some hassle.</p></blockquote><p></p>
[QUOTE="eshorebwhntr, post: 811968, member: 17112"] Finally a post in the reloading section with some intelligent discussion and factual data to back it up. Great info. Just wanted to add as a side note a finding that I had a few weeks ago in regard to neck sizing. I've got a custom chamber STW by Gre-Tan. It was cut with a .313 neck based on the dummy cartridge I sent with Remington brass. Now that there is short supply of that brass and since I had heard many good things about Norma I fire-formed some for my rifle from 300 H&H brass a while back. Once loaded up the neck diameter with the norma brass is only .310, so .003 clearance as opposed to a tight fit with the Remington. So far I've only been able to shoot at 100 yards for comparison but there is a fall off in accuracy with the Norma brass. It's not much, but it is noticeable. This gun would consistently cut one hole at that range and now its more like a clover leaf. I still need to continue with load development but so far that is what I've found. I also noticed a higher spread in velocity as well. Both probably deserve more testing at this stage but I thought it was worth sharing. Another note...if you start out wondering what size bushing to use don't try to mic the wall thickness and double it to calculate the bushing diameter. Find a way to size it down enough to get a tight fit on the bullet and mic the neck of a loaded round. Much more accurate and gets you the correct bushing the first time. I learned the hard way, hopefully someone else reads this down the road and it saves them some hassle. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Pulling bullets / Reseating / Neck Tension
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