Kaeghl Posted March 1, 2015 at 01:14 AM Share Posted March 1, 2015 at 01:14 AM I was asked a couple of questions about why 7.62 vs 308 win, and 223 vs 5.56 in this gun vs that barrel, etc etc etc. Rather than go with "Hmmm, I had always heard....", I'd rather be able to look up 'the straight poop' and cite a final authority. However, my google-fu is not up to snuff, lately. Specifically, where do I go on line to find out why its best to have a barrel stamped 5.56 and why it can handle .223 also, and why a 308 can or can't handle a 7.62 nato, or is it vice versa? A site that lists things in nice bite size pieces with lots of diagrams and pictures would be perfect. Thanks in advance. Link to comment Share on other sites More sharing options...
Elmer Fudd Posted March 1, 2015 at 01:24 AM Share Posted March 1, 2015 at 01:24 AM There are a whole lot of sites and I doubt that there is one that will fit the bill, however, for ammo related information, the SAAMI site is the goto for me. Link to comment Share on other sites More sharing options...
tkroenlein Posted March 1, 2015 at 01:36 AM Share Posted March 1, 2015 at 01:36 AM EF has got what you need. You can google "SAAMI specs 7.62 NATO" or the like and you should get right to the info you want. Link to comment Share on other sites More sharing options...
abolt243 Posted March 1, 2015 at 01:41 AM Share Posted March 1, 2015 at 01:41 AM Google .223 vs 5.56 or .308 vs 7.62 vs .308 More information than you can digest. Link to comment Share on other sites More sharing options...
tkroenlein Posted March 1, 2015 at 01:52 AM Share Posted March 1, 2015 at 01:52 AM BTW, the real simple answer without comparing and contrasting chamber drawings and volumes of pressure data is this-NATO spec ammo and barrels/chambers are designed to 1) operate at a higher maximum average working pressure and 2) enhance operational reliability in combat. You can cite your source as tk on IC, who is an OFFICIAL member and only gives correct answers. Link to comment Share on other sites More sharing options...
mauserme Posted March 1, 2015 at 02:20 AM Share Posted March 1, 2015 at 02:20 AM SAAMI has a list of Unsafe Firearm Ammunition Combinations with a very brief explanation of unsafe pressures. Link to comment Share on other sites More sharing options...
TomKoz Posted March 1, 2015 at 05:35 AM Share Posted March 1, 2015 at 05:35 AM I know I'm putting the bait out here but, I'm so confused!!! Link to comment Share on other sites More sharing options...
Kaeghl Posted March 1, 2015 at 06:25 PM Author Share Posted March 1, 2015 at 06:25 PM A big help, thank you all very much.... Now off to happy learning .......... Link to comment Share on other sites More sharing options...
DD123 Posted March 1, 2015 at 06:43 PM Share Posted March 1, 2015 at 06:43 PM The best explanation I received on both 5.56 vs 223 and 7.62 vs 308 goes something like this: 5.56 is loaded very hot compared to 223 which was used as a varmint round so you can use the 223 in a 5.56 marked barrel but not the other way around. 7.62X51 is actually loaded less hot than the 308 rounds out there so you can use 7.62 in a 308 marked barrel but not the other way around. The SAAMI site has more of the detailed information, but the above is what I keep in mind when purchasing ammo and such. Link to comment Share on other sites More sharing options...
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