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Posted: 11/4/2008 8:00:04 PM EDT
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I was wondering what 's the difference between crimped and non crimped primers. I see on some sights that they sell both. So do the crimped have a longer shelf life? Thanks Mike |
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There is no difference in shelf life what so ever. The primers are the same compounds and perhaps even the same make.
The ammunition that has crimped primers are much less likely to have problems if the load is a bit too high pressure (which can happen with some powders used and the temperature is too high––-like sitting in a hot car in the summer). When high pressure occurs, the primer can be blown out of the case when fired. For military use, they require the primers to be crimped, because one never knows what conditions a battle might encounter. For instance say a soldier is in a firefight and his barrel got really hot, then there is a round in the chamber heating up. When firing, the pressure of that cartidge might be high enough to blow a non-crimped primer. Blown primers can cause actions to sieze-up which is detrimental in a combat situation. But for hunting, or normal range use, this is not a problem. The other disadvangate with crimped primers is for handloaders (reloaders). The crimped cases must have the primer pockets swaged or reamed before inserting a new primer. If you plan only on shooting and then leaving your brass on the range floor, then it does not matter whether the cases are crimped or not––-for you. But if you decide that you might want to reload or sell the cases to someone who does reload, then the non-crimped primers are probably better. However, even handloaders know that a crimped primer pocked means that the case is once fired and if it has and LC head stamp those are good cases. These handloaders know about removing the crimp, and like the quality cases. Hope that anwers your questions. |
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