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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Runout question
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<blockquote data-quote="Mysticplayer" data-source="post: 34765" data-attributes="member: 8947"><p>Chris, I wonder if runout was why those cartridges didn't chamber? If you had runout of 5 thou, even 10thou, the cartridge should chamber. My guess is that you have a sizing or bullet length issue here.</p><p></p><p>I have used the rolling of cases on a flat hard surface for years and it has worked. You will not detect the difference in a couple of thou but as long as runout is under 4 thou (no visible wobble), it will shoot small groups (not BR groups just around 1/4 MOA). Testing the ammo at 250yds will confirm if things are good or bad. </p><p></p><p>I demand that my LR hunting ammo dump the rounds inside 1" to 1 1/2" at 250yds. Not BR accuracy but I am not shooting a BR rifle either. </p><p></p><p>For sizing, consider the Lee Collet neck sizing die. Produces very low runout cases. If the necks are straight, odds are the seating die will not screws things up. If concerned there, the Forster BR seating die is superb. Unfortunately, not readily availabe in wildcats.</p><p></p><p>At some point you have to be able to monitor your ammo so that you can eliminate things that are causing your groups to be bigger then necessary.</p><p></p><p>Test firing will only show that something is not right. Being able to measure during the different handloading steps will confirm where problems areas are.</p><p></p><p>Jerry</p></blockquote><p></p>
[QUOTE="Mysticplayer, post: 34765, member: 8947"] Chris, I wonder if runout was why those cartridges didn't chamber? If you had runout of 5 thou, even 10thou, the cartridge should chamber. My guess is that you have a sizing or bullet length issue here. I have used the rolling of cases on a flat hard surface for years and it has worked. You will not detect the difference in a couple of thou but as long as runout is under 4 thou (no visible wobble), it will shoot small groups (not BR groups just around 1/4 MOA). Testing the ammo at 250yds will confirm if things are good or bad. I demand that my LR hunting ammo dump the rounds inside 1" to 1 1/2" at 250yds. Not BR accuracy but I am not shooting a BR rifle either. For sizing, consider the Lee Collet neck sizing die. Produces very low runout cases. If the necks are straight, odds are the seating die will not screws things up. If concerned there, the Forster BR seating die is superb. Unfortunately, not readily availabe in wildcats. At some point you have to be able to monitor your ammo so that you can eliminate things that are causing your groups to be bigger then necessary. Test firing will only show that something is not right. Being able to measure during the different handloading steps will confirm where problems areas are. Jerry [/QUOTE]
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