I received a Norinco AR15, receiver says 223, paper says 5.56?
- Thread starter Gaebz
- Start date
- Location
- West Quebec
Bingo !!!
This should be post number 2 and all the rest can be deleted.
- Location
- Western Manitoba
OP - pull up the chamber drawings from Internet. Cerrosafe cast your chamber. Measure. That is the only way you will know what shape was machined into your barrel, if you do not trust / accept the manufacturer's stamping.
Here is the working link to the Lucky Gunner Labs 5.56 vs .223 comparison posted above:
http://https://www.luckygunner.com/labs/5-56-vs-223/
Long story short, it is unlikely to be a problem. If you get popped primers, don't use that ammo in that rifle. Also, keep in mind that the CIP maximum pressure for .223 is the same as 5.56 NATO.
5.56 and .223 cases are basically equivalent for reloading purposes, with the only difference being typical variation between different manufacturers.
7.62 NATO and .308 is another example where the differences are grossly exaggerated. The supposed pressure difference is really confusion between pressures obtained from copper crusher and transducer test methods, with the transducer producing higher numbers of the two.
Some 7.62 NATO firearms may have excessive headspace by .308 standards, but this is only likely to cause short brass life.
7.62 cases are normally heavier than commercial .308 ones, so the solution to this is to reduce maximum powder charge by 1-2 grains.
http://https://www.luckygunner.com/labs/5-56-vs-223/
Long story short, it is unlikely to be a problem. If you get popped primers, don't use that ammo in that rifle. Also, keep in mind that the CIP maximum pressure for .223 is the same as 5.56 NATO.
5.56 and .223 cases are basically equivalent for reloading purposes, with the only difference being typical variation between different manufacturers.
7.62 NATO and .308 is another example where the differences are grossly exaggerated. The supposed pressure difference is really confusion between pressures obtained from copper crusher and transducer test methods, with the transducer producing higher numbers of the two.
Some 7.62 NATO firearms may have excessive headspace by .308 standards, but this is only likely to cause short brass life.
7.62 cases are normally heavier than commercial .308 ones, so the solution to this is to reduce maximum powder charge by 1-2 grains.
Turkinator
CGN frequent flyer
- Location
- Onterrible
wayupnorth
CGN Ultra frequent flyer
- Location
- Northern Alberta
i was told that this was the place to come if you wanted to find out about 1000rds of 556 for $315?
The only time I came across such a price (perhaps even better) was at Christmass last year till end of March this year.
It was American Eagle .223 („military spec”) box of bulk 1000 rounds. It was on sale at Christmass. On top of that „American Eagle” offered US$50 of rebate per box of (bulk) 1000 rounds from December last year till end of March this year.
Including taxes, I remember I ended up paying 34 cents per round. So far, that was best price I’ve ever came across last 2 years...
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