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Post by Deleted on Apr 18, 2017 15:09:28 GMT -5
I Fired a like newish 24V 223/20 yesterday. Opened a brand new box of Factory Hornady 40gr V-max for the occasion to see how she'd do. Familiar story....First 6 cases stuck and I had to use my cleaning rod to ram them out. For several of those my chronograph indicated error. For some, and then the rest of the box, it read between 3800-3900 FPS. On the 7th and 8th shot, the case extracted smoothly and freely. Pretty cool, sure, but I wondered what if anything was different between the cases that allowed for such a change, so I began inspecting the 7-8th vs the first 6. I was surprised to find 2 of the first 6 cases completely cracked in half-horizontally near the primer end of the case, and a horizontal ring around the other of those first 6 cases where they were also trying to crack in half. Curiosity got to me and I couldn't help myself, so with some fear and hesitation, I fired a few more shots and it was all good in the hood. I didn't experience any other issues. The rest of the box fired and extracted smoothly and freely with no sign of over-pressure issues. All measurable shots maintained an approximate average ~3850 FPS, except for the error readings that occurred during the first 6 shots.
Any similar experience or thoughts on this?
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Post by vancmike on Apr 20, 2017 14:12:14 GMT -5
I'd check the headspace. You can rent, borrow or just wander by a gunsmith who would certainly have a .223 headspace gauge in stock (it's just a matter of shoving in 'go' or 'no-go' gauges into the chamber.
First, you want to see if the gun has unwanted slack in the action. Open the action and put a thin piece of paper in front of the receiver, then close it. If it closes with the paper in place, there's too much slack. Keep adding paper until it finally won't close and that'll tell you the extent of the loose-ness (is that a word?).
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Post by bigkelly on Apr 20, 2017 16:35:36 GMT -5
in your part of the world!!!
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Post by Deleted on Apr 22, 2017 20:52:48 GMT -5
VancMike, I'm familiar with headspace and the use of go gauges and I think You are right, I guess checking the headspace is kind of the obvious place to start. If I had to put my next paycheck on it though, I'd say id be looking at a short chamber with too little headspace as opposed to any extra....if indeed headspace is an issue. The lockup is air tight and rock solid.....no Loose-ness!!! Clearly something wasn't right.....but you'd never have know it if you had only shot the second half of the box. Groups were good, cases extracted as designed, velocities all comparable, no pressure signs on the cases, all that good stuff. Unfortunately my experience with any local gunsmiths has been far less than positive. Cranky old jerks who support the stero types belayed by anti gun haters. I suppose I'll have to order a set of gauges and then maybe resell them.
Also, for what it's worth, I try to run the grammar police out of Cincy when I can. Since you've effectively communicated your thought, then your new word,Loose-ness, gets added to the Rustbelt dictionary of redneck words. Thanks for the suggestion.
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