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Rifles, Reloading, Optics, Equipment
Reloading
Belted Magnum questions for you guys..
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<blockquote data-quote="MagnumManiac" data-source="post: 620857" data-attributes="member: 10755"><p>Sorry for the late reply.</p><p>The bulge will not improve by fireforming the brass, but it will give you positive headspace, instead of the current negative headspace you have on your brass.</p><p>The reason you use a light charge is so that the case isn't stretched in the belt area, a light charge allows the entire case to move in the chamber when max pressure is reached, blowing the shoulder forward without the rear of the case being stretched to the bolt face. I have used this method for many years, and believe me, it works just as I state here. NO CASE STRETCHING OR BULGES OCCUR!</p><p>This will give you a new starting point for that brass lot.</p><p></p><p>A normal pressure load causes the case walls to grip the chamber tightly, not allowing any case movement, and due to headspace, the case walls just ahead of the web, the solid portion of the case, stretches backwards until firm contact is made with the bolt face, this is what is causing the bulging in your rifle cases.</p><p> </p><p>Technically, a belted case headspacing on the belt is correct in all aspects, but chamber dimensions in the shoulder to belt measurement are not held to a tight tolerance, neither are case head to shoulder measurements, this can compound, making things even worse.</p><p></p><p>Of all the powders you list, only Benchmark would be suitable with light bullets, you really need to use a fast pistol/shotgun powder with pumpkin or potato to do the job correctly.</p><p></p><p>gun)</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 620857, member: 10755"] Sorry for the late reply. The bulge will not improve by fireforming the brass, but it will give you positive headspace, instead of the current negative headspace you have on your brass. The reason you use a light charge is so that the case isn't stretched in the belt area, a light charge allows the entire case to move in the chamber when max pressure is reached, blowing the shoulder forward without the rear of the case being stretched to the bolt face. I have used this method for many years, and believe me, it works just as I state here. NO CASE STRETCHING OR BULGES OCCUR! This will give you a new starting point for that brass lot. A normal pressure load causes the case walls to grip the chamber tightly, not allowing any case movement, and due to headspace, the case walls just ahead of the web, the solid portion of the case, stretches backwards until firm contact is made with the bolt face, this is what is causing the bulging in your rifle cases. Technically, a belted case headspacing on the belt is correct in all aspects, but chamber dimensions in the shoulder to belt measurement are not held to a tight tolerance, neither are case head to shoulder measurements, this can compound, making things even worse. Of all the powders you list, only Benchmark would be suitable with light bullets, you really need to use a fast pistol/shotgun powder with pumpkin or potato to do the job correctly. gun) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Belted Magnum questions for you guys..
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