Path: spln!rex!extra.newsguy.com!lotsanews.com!howland.erols.net!news.airnews.net!cabal10.airnews.net!cabal1.airnews.net!news-f.iadfw.net!usenet From: "Skip Hammond" <ehammond@airmail.net> Newsgroups: misc.survivalism Subject: Re: 7.62 NATO Round Date: Sun, 10 Feb 2002 19:35:50 -0600 Organization: Airnews.net! at Internet America Lines: 91 Message-ID: <33DC6E79042334D3.B207E5AB928A9019.9CB510CABAE5651D@lp.airnews.net> X-Orig-Message-ID: <a476pq$p8o@library1.airnews.net> References: <6oG68.814$Su.458218@news2.news.adelphia.net> <f3bb0717.0202020129.19a1c7f9@posting.google.com> <q6h16uch2mrjmndrk2q55g4na0jjvd70av@4ax.com> Abuse-Reports-To: abuse at airmail.net to report improper postings NNTP-Proxy-Relay: library1-aux.airnews.net NNTP-Posting-Time: Sun Feb 10 19:29:30 2002 NNTP-Posting-Host: !bE2o1k-X4V+@DO (Encoded at Airnews!) X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 Xref: spln misc.survivalism:432234 Military style rifles have chambers cut to NATO spec, which is somewhat larger than SAAMI spec. to allow for fouling, dirt, etc. under field conditions. Small base dies are sometimes needed for civilian semi-autos with SAAMI spec chambers. I have seen problems - case head separation- on the first reloading of brass used in a HK 91. Loads were not anywhere near maximum and the problem was resolved when standard full-length dies were used. This was 15- 20 years ago, and I do not remember if brass was military or civilian. Surplus 7.62 brass has most likely been used in machine guns with very loose chambers and headspace that would be excessive in a bolt rifle. Using small-base dies may overwork the brass and lead to early failure. I would strongly urge using standard dies, unless a problem is experienced with chambering. Another consideration for gas operated rifles is the pressure curve produced by the powder. It is important that the pressure at the gas port does not exceed design limits. For this reason it is best to stay with powders in the burning range of 4895. Using slower powders like 4350 or 4831 which may be great for some applications in bolt rifles can produce port, not peak, pressures exceeding limits. This will lead to premature wear, excessive cyclic rate, and can bend or break parts such as the operating rod. Some advise using only mil-spec ammo in military style rifles, but I am unaware of any problems from SAAMI spec. factory ammo. Under no circumstances should you use the"light magnum" ammo in gas operated semi's. It is loaded with large amounts of very slow burning powder and will definitely produce excessive port pressure. "Gunner" <gunner@lightspeed.net> wrote in message news:q6h16uch2mrjmndrk2q55g4na0jjvd70av@4ax.com... > On 2 Feb 2002 01:29:34 -0800, condor_chef@hotmail.com (Condor Chef) > wrote: > > >"SniperBait" <SniperBait@adelphia.net> wrote in message news:<6oG68.814$Su.458218@news2.news.adelphia.net>... > >> Does anyone know the load to reproduce 7.62X51 NATO Rifle ammo. I am using > >> 147g IMI Mil spec bullets, low capacity military brass and some odd lots of > >> commercial brass. > >> > >> I am not looking for extreme accuracy, rather performance in various > >> military type semi autos. > > > >Hmmm. Well, part of the "performance package" *is* accuracy in the > >7.61X51... > > > >Would strongly suggest that you bag the "odd lots" of brass, and stick > >with one lable, even if it's one of the "odd lots"... Consistency is > >the difference between a lead-thrower and a battle rifle, and you'll > >be hard-pressed to get it with "Mutt and Jeff" brass. > > > >The next thing I would do is use a small base (SB) resizing die for > >the first loading, closely check your overall length, then only use > >the ammo in one rifle. After the first resizing/firing, you *may* be > >able to switch to a "neck only" resizing die, as long as the ammo will > >only be fired in one rifle. > > > >Semi-autos are particularly finicky about extracting oversize brass. > >The chamber in any given FAL is a different size than an M1A -- only > >takes a tiny difference to hang up brass in the "non-sloppy" chamber. > > So, if you insist on running your reloads through several different > >rifles, SB dies are the way to go; *however*, SB dies will also thin > >and fatigue your brass faster, so you'll get fewer reloads. > > > >As far as the actual load...hehehe...no one here is silly enough to > >feed you numbers - buy or borrow a load book, and sue *them* when you > >shred your barrel.. ;) > > Excellent advice! > > > >I like Nosler, but have Speer as well for comparison. > > > I have 11 manuals, and use them all. Including the Powley computers, and > various software, including a Ohueler chronograph.... > > Gunner > > > > >CC > > > > This Message is guaranteed environmentally friendly > Manufactured with 10% post consumer ASCII > Meets all EPA regulations for clean air > Using only naturally occuring fibers > Use the Message with confidance. > (Some settling may occure in transit.) > (Best if Used before May 13, 2009)