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The Range
Ammo & Reloading
Reloading Newbie Questions - Flaring and Crimping
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<blockquote data-quote="Blitzfike" data-source="post: 1750022" data-attributes="member: 807"><p>You didn't mention what powder you are using. Some powders are very forgiving of bullet seating depth while others, Accurate #5 for one tend to jack pressures up very quickly if bullets are seated deeper than specified. In most cases if you seat the bullet so that there is some clearance between the bullet nose and the front of the magazine, things work pretty well. The danger in seating the bullet deeper than specified for a particular powder, causes rising pressures. At one stage of my life I carried a weapon professionally and had to be careful about inserting the same round at the top of the mag after clearing the weapon. Repeated chambering even with factory ammo tends to jam the bullet deeper in the case, causing potential pressure spikes. I usually replaced the old top round with a new one and put the other in the box for target practice. I load 9 different semi auto pistol calibers and every one is particular about crimping. A nice taper crimp or a lee factory crimp assures proper feeding. All the semi autos I load and shoot headspace on the case mouth except for 2. Too much crimp can cause headspace problems again leading to dangerous conditions. Not enough crimp causes jams when the round doesn't completely enter the chamber.</p></blockquote><p></p>
[QUOTE="Blitzfike, post: 1750022, member: 807"] You didn't mention what powder you are using. Some powders are very forgiving of bullet seating depth while others, Accurate #5 for one tend to jack pressures up very quickly if bullets are seated deeper than specified. In most cases if you seat the bullet so that there is some clearance between the bullet nose and the front of the magazine, things work pretty well. The danger in seating the bullet deeper than specified for a particular powder, causes rising pressures. At one stage of my life I carried a weapon professionally and had to be careful about inserting the same round at the top of the mag after clearing the weapon. Repeated chambering even with factory ammo tends to jam the bullet deeper in the case, causing potential pressure spikes. I usually replaced the old top round with a new one and put the other in the box for target practice. I load 9 different semi auto pistol calibers and every one is particular about crimping. A nice taper crimp or a lee factory crimp assures proper feeding. All the semi autos I load and shoot headspace on the case mouth except for 2. Too much crimp can cause headspace problems again leading to dangerous conditions. Not enough crimp causes jams when the round doesn't completely enter the chamber. [/QUOTE]
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