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<blockquote data-quote="ARlife4me" data-source="post: 2701637" data-attributes="member: 105694"><p>The creedmoor cartridges are designed for the boat-tail in the shoulder and still have a long freebore. The 22-250rem is almost the same as the 22creed in terms of case length (shoulder angle being greater), but the 250 has less freebore and built for varmints (light weight bullets per caliber). I don't remember the guy's name, but I believe he is somewhere in Indiana or near state. He discusses freebore/throat and chasing the lands. From his testing (say 20k off) and shooting X amount of times then remeasure throat and how it has changed/grown (say 22k off now). He does this several times and measures keeping track of growth. Then he test with (say 120k off) and goes thru the same test procedures. After the test the conclusion is that it's best to stay farther off that keep chasing the lands. you can shoot more without making so many changes. I'm not sure if it was from this forum or another that someone had posted? I don't remember if the person doing the test is a gunsmith/prs or just someone who has shooting classes?</p></blockquote><p></p>
[QUOTE="ARlife4me, post: 2701637, member: 105694"] The creedmoor cartridges are designed for the boat-tail in the shoulder and still have a long freebore. The 22-250rem is almost the same as the 22creed in terms of case length (shoulder angle being greater), but the 250 has less freebore and built for varmints (light weight bullets per caliber). I don't remember the guy's name, but I believe he is somewhere in Indiana or near state. He discusses freebore/throat and chasing the lands. From his testing (say 20k off) and shooting X amount of times then remeasure throat and how it has changed/grown (say 22k off now). He does this several times and measures keeping track of growth. Then he test with (say 120k off) and goes thru the same test procedures. After the test the conclusion is that it's best to stay farther off that keep chasing the lands. you can shoot more without making so many changes. I'm not sure if it was from this forum or another that someone had posted? I don't remember if the person doing the test is a gunsmith/prs or just someone who has shooting classes? [/QUOTE]
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