SPWhite Posted September 13, 2014 Report Share Posted September 13, 2014 I hope this is the right place for this question. I just picked up a M&P 10. A friend of mine gave me about 200 rounds of what he says is 7.62. It has a head stamp that reads. LC. 74 and a circle with a cross in it. It looks like a 7.62, but I want to make sure before I shoot them. I would hate to chamber a round that is the wrong caliber. Can some one give me an answer. Thanks. Quote Link to comment Share on other sites More sharing options...
BigP623 Posted September 13, 2014 Report Share Posted September 13, 2014 (edited) Some one can correct me if Im wrong but that should mean 1974 Lake city (manufacturer) with a nato headstamp (circle with cross) Probably old milsurp ammo It doesn't have a designation on it of what caliber on the packaging? Buy a box of 308 and compare... Edited September 13, 2014 by BigP623 Quote Link to comment Share on other sites More sharing options...
unforgiven Posted September 13, 2014 Report Share Posted September 13, 2014 If it's brand new burn it in with factory,then use the mil-surp.Just my 2 mags. Quote Link to comment Share on other sites More sharing options...
shibiwan Posted September 13, 2014 Report Share Posted September 13, 2014 Do they look like this (left cartridge) Quote Link to comment Share on other sites More sharing options...
SPWhite Posted September 13, 2014 Author Report Share Posted September 13, 2014 Yes but with 74 not 13 Quote Link to comment Share on other sites More sharing options...
SPWhite Posted September 13, 2014 Author Report Share Posted September 13, 2014 I had planned on using factory ammo for break in. Thank y'all for the replying so fast. Quote Link to comment Share on other sites More sharing options...
shibiwan Posted September 13, 2014 Report Share Posted September 13, 2014 I'd run the old milsurp to break in.... Quote Link to comment Share on other sites More sharing options...
jtallen83 Posted September 13, 2014 Report Share Posted September 13, 2014 I'd run the old milsurp to break in.... <thumbsup> Quote Link to comment Share on other sites More sharing options...
Toolndie7 Posted September 13, 2014 Report Share Posted September 13, 2014 Do they look like this (left cartridge) Listen to this guy. He's a black thumb when it comes to firearms! Quote Link to comment Share on other sites More sharing options...
survivalshop Posted September 13, 2014 Report Share Posted September 13, 2014 Measure one if not sure Quote Link to comment Share on other sites More sharing options...
shepp Posted September 13, 2014 Report Share Posted September 13, 2014 Measure one if not sure That's awesome that's going on the FB page Quote Link to comment Share on other sites More sharing options...
SPWhite Posted September 13, 2014 Author Report Share Posted September 13, 2014 Thanks for all the replays. I will have to get new batteries for my calipers and do some measurements Quote Link to comment Share on other sites More sharing options...
planeflyer21 Posted September 14, 2014 Report Share Posted September 14, 2014 Listen to this guy. He's a black thumb when it comes to firearms! He blames it on the machine shop. We know it was really first time with a M1 Garand. Quote Link to comment Share on other sites More sharing options...
unforgiven Posted September 14, 2014 Report Share Posted September 14, 2014 He blames it on the machine shop. We know it was really first time with a M1 Garand. I heard that can happen :yup: ,read it on the internet. <lmao> Quote Link to comment Share on other sites More sharing options...
shibiwan Posted September 14, 2014 Report Share Posted September 14, 2014 (edited) Black thumb is evolving - I can gross my wife and kids out by sticking it in front of their faces. Edited September 14, 2014 by shibiwan Quote Link to comment Share on other sites More sharing options...
98Z5V Posted September 14, 2014 Report Share Posted September 14, 2014 (edited) OP, Make sure that NOT Lake City 1974 30-06 ammo... Buy some .308 Win and compare it, or measure the case length, based on the above. Shib, that thumb is impressive. <thumbsup> We need updates, as it leaves... <lmao> I can't tell you how many of those things I've smashed and lost... :eek: Edited September 14, 2014 by 98Z5V Quote Link to comment Share on other sites More sharing options...
shepp Posted September 14, 2014 Report Share Posted September 14, 2014 OP, Make sure that NOT Lake City 1974 30-06 ammo... Buy some .308 Win and compare it: Great point 98!!!!!! Quote Link to comment Share on other sites More sharing options...
shibiwan Posted September 14, 2014 Report Share Posted September 14, 2014 Great point 98!!!!!! I got some 30-06 LC Match brass mixed in with the lot... looks remarkably identical, just longer. Quote Link to comment Share on other sites More sharing options...
DNP Posted September 14, 2014 Report Share Posted September 14, 2014 Good news is, 30-06 won't fit in the mag and won't chamber...right? Quote Link to comment Share on other sites More sharing options...
shibiwan Posted September 14, 2014 Report Share Posted September 14, 2014 Good news is, 30-06 won't fit in the mag and won't chamber...right? Not even close! Quote Link to comment Share on other sites More sharing options...
SPWhite Posted September 17, 2014 Author Report Share Posted September 17, 2014 Broke out the calipiers out and compaired them to factory 308 and they are 7.62. Thanks for all the replys. Quote Link to comment Share on other sites More sharing options...
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