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Rifles, Reloading, Optics, Equipment
Reloading
5.56 brass
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<blockquote data-quote="Trickymissfit" data-source="post: 592869" data-attributes="member: 25383"><p>hunt up the back issue from Rifle magazine on the difference between the two. They even went so far as to publish the correct chamber drawings. There is no difference other than chamber pressure & throat, and if the gun wont stand 60K PSI and it's a bolt gun; you shouldn't be shooting anything over 45K psi anyway. The AR's with .223 chambers were probably being loaded with military brass (which is junk), and then using published .223 loads right out of the book. A .223 SAAMI spec is 55K PSI, and like I said blackhills loads their 5.56 match to 58K PSI. Your not talking 65K PSI here, and either rifle should hold up well. All the AR's I've owned were chambered in 5.56, but can see the problem with the different throat length and angle. Think there maybe be more than one 5.56 chamber as well. The orginal one was short for the 53 grain bullets it was designed for. The later ones have got to be longer to handle the longer and heavier bullets; I'd like to think.</p><p> </p><p>As for bolt guns and 5.56, I've shot a lot of it thru the years without a hitch. Recoil is ever so slightly stronger (not very much), and none of it ever shot all that well anyway. I just wanted the cases.</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 592869, member: 25383"] hunt up the back issue from Rifle magazine on the difference between the two. They even went so far as to publish the correct chamber drawings. There is no difference other than chamber pressure & throat, and if the gun wont stand 60K PSI and it's a bolt gun; you shouldn't be shooting anything over 45K psi anyway. The AR's with .223 chambers were probably being loaded with military brass (which is junk), and then using published .223 loads right out of the book. A .223 SAAMI spec is 55K PSI, and like I said blackhills loads their 5.56 match to 58K PSI. Your not talking 65K PSI here, and either rifle should hold up well. All the AR's I've owned were chambered in 5.56, but can see the problem with the different throat length and angle. Think there maybe be more than one 5.56 chamber as well. The orginal one was short for the 53 grain bullets it was designed for. The later ones have got to be longer to handle the longer and heavier bullets; I'd like to think. As for bolt guns and 5.56, I've shot a lot of it thru the years without a hitch. Recoil is ever so slightly stronger (not very much), and none of it ever shot all that well anyway. I just wanted the cases. gary [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
5.56 brass
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