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Rifles, Reloading, Optics, Equipment
Reloading
How do I find the lands?
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<blockquote data-quote="jeffwhip" data-source="post: 539015" data-attributes="member: 22355"><p>Ok guys, here is what I did. I bought the Hornady Lock-N-Load Straight O.A.L. Gauge from Bruno's Shooter Supply in Phoenix. I also bought a 280 Remington case with a 30 deg shoulder because I figured it would work for my 280 AI as long as I turned the neck. Next, I turned the neck to .0125 so it would fit into my tight neck chamber 280 AI (.311).</p><p></p><p>After several measurements, I was consistently measuring 3.375". Next, I seated the same bullet to 3.507" on two different cases and then slowly chambered the round. When I felt the resistance, I slowly forced the bolt closed. Next I opened the bolt and extracted the round. I did this on two different rounds and then measured the length. The first one measured 3.402" and the second one measured 3.407".</p><p></p><p>After reading the comments on my post, it appears that when I chamber a round jammed into the lands, it is .032" & .027" longer than my measurement. So, my question is which reading should I use as my starting point? After talking to a buddy here who has the exact same gun & barrel made from the same reamer, he is running his .020" off the lands. Thanks again for your responses.</p></blockquote><p></p>
[QUOTE="jeffwhip, post: 539015, member: 22355"] Ok guys, here is what I did. I bought the Hornady Lock-N-Load Straight O.A.L. Gauge from Bruno's Shooter Supply in Phoenix. I also bought a 280 Remington case with a 30 deg shoulder because I figured it would work for my 280 AI as long as I turned the neck. Next, I turned the neck to .0125 so it would fit into my tight neck chamber 280 AI (.311). After several measurements, I was consistently measuring 3.375". Next, I seated the same bullet to 3.507" on two different cases and then slowly chambered the round. When I felt the resistance, I slowly forced the bolt closed. Next I opened the bolt and extracted the round. I did this on two different rounds and then measured the length. The first one measured 3.402" and the second one measured 3.407". After reading the comments on my post, it appears that when I chamber a round jammed into the lands, it is .032" & .027" longer than my measurement. So, my question is which reading should I use as my starting point? After talking to a buddy here who has the exact same gun & barrel made from the same reamer, he is running his .020" off the lands. Thanks again for your responses. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
How do I find the lands?
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