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Rifles, Reloading, Optics, Equipment
Reloading
Bullet Runout---How to Fix
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<blockquote data-quote="abinok" data-source="post: 96543" data-attributes="member: 16"><p>Being that Kirby cut the chamber in your 270AM, I doubt there will be any problem with the gun /ubbthreads/images/graemlins/smile.gif Consequently, you just need to focus on not screwing up the fireformed-straight neck while sizing. Have you tried sizing any brass without the expander to see how much constriction is taking place? Not saying that the expander is nessicarily the culprit, but it tends to drag problems to light. What trimmer are you using? Ive seen unsquare case mouths and expanders cause runout problems.</p><p>The "best" solution may well be a lee collet die as Jim mentioned. .001" and under is common on everything I load with them. Naturally, you would have to have a custome one, but,even then, its only $50. Id also suggest that you specify a pair of mandrels that are undersized when you order it. It will come with one thats .0015" or so under bullet diameter. you will probably want one thats .0025, and .0035" under, so you can have more controll over neck tension. Even with the custom mandrels, it should be under $70.</p><p>Give it some thought /ubbthreads/images/graemlins/smile.gif</p><p>Its $70, but it will pretty much whup your runout problems.</p></blockquote><p></p>
[QUOTE="abinok, post: 96543, member: 16"] Being that Kirby cut the chamber in your 270AM, I doubt there will be any problem with the gun [img]/ubbthreads/images/graemlins/smile.gif[/img] Consequently, you just need to focus on not screwing up the fireformed-straight neck while sizing. Have you tried sizing any brass without the expander to see how much constriction is taking place? Not saying that the expander is nessicarily the culprit, but it tends to drag problems to light. What trimmer are you using? Ive seen unsquare case mouths and expanders cause runout problems. The "best" solution may well be a lee collet die as Jim mentioned. .001" and under is common on everything I load with them. Naturally, you would have to have a custome one, but,even then, its only $50. Id also suggest that you specify a pair of mandrels that are undersized when you order it. It will come with one thats .0015" or so under bullet diameter. you will probably want one thats .0025, and .0035" under, so you can have more controll over neck tension. Even with the custom mandrels, it should be under $70. Give it some thought [img]/ubbthreads/images/graemlins/smile.gif[/img] Its $70, but it will pretty much whup your runout problems. [/QUOTE]
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Reloading
Bullet Runout---How to Fix
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