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March 29, 2009, 05:30 PM | #1 |
Senior Member
Join Date: October 27, 2008
Posts: 242
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Federal 205M primers for .223
Alright all these shortages have got me scrounging for stuff... Anyhow a friend of a friend has 500 federal 205M primers - are these safe to use in a .223 as I've read about the cups being to thin along with a whole heap of other problems just recently on the forum.
By what I've seen so far, the 205M are safe but I want confirmation, also if anyone uses these what load data are you using? |
March 29, 2009, 05:47 PM | #2 |
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Join Date: March 4, 2005
Location: Ohio
Posts: 21,060
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They've only been held to be too soft in self-loaders or in guns with very loose headspace, but I've used them with no problems in my AR (tight match chamber, though). The most important thing to preventing slam fires in the self-loaders is to seat the primers below flush with the case head. 0.004"-0.005" is ideal, but any amount below flush is better than none. Just take a steel straight edge and lay it across each primed case head and make sure some small light crack shows between it an the primer. Keep in mind that lots pf Federal Gold Medal match ammo gets fired in service rifles every year with no problems, and it uses those same primers AFAIK.
If you are lucky enough to own a Forster/Bonanza Co-ax press, it uniquely has a priming system that forces the primers to be 0.004" below grade. The Forster/Bonanza bench priming tool does not have it, however. Just the press. When I load for the service rifle I generally prime by hand, but run the thorough the Co-ax priming tool afterward to ensure final seating depth is good. The proliferation of progressive loading tools has lead to some laxity in inspecting for primer seating, but don't skip it. If you have trouble getting the primer in that deep, get a primer pocket depth uniforming tool (not the same as a profile cutter) that cuts the pocket to maximum depth.
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Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle Last edited by Unclenick; March 29, 2009 at 05:52 PM. |
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