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Old February 8, 2013, 04:06 PM   #1
Daekar
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Shooting XM193 in a 223 Rem.

I recently acquired a Howa 1500 chambered in 223, and I'm curious to know if it is advisable to shoot XM193 FMJ rounds through this gun. I already have the ammo for my V93, but that gun has a fluted chamber and renders the cases unsuitable for reloading, so if I want to use the cases they'd have to fired in the new gun. I have heard stories about military ammo causing permanent damage to sporting barrels (compromising future accuracy), and I don't want to run into overpressure situations if the chambers are subtly incompatible.
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Old February 8, 2013, 04:32 PM   #2
PawPaw
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Cheaper Than Dirt says no.
Quote:
The primary differences between .223 Remington and 5.56 x 45 mm (NATO) are that .223 Remington is loaded to lower pressures and velocities compared to 5.56 NATO and the 5.56 NATO chamber has a longer leade. .223 Remington ammunition can be safely fired in a 5.56 NATO chambered gun, but the reverse can be an unsafe combination. The additional pressure created by 5.56 NATO ammo will frequently cause over-pressure problems such as flowing brass, difficult extraction, or popped/punctured primers, but in extreme cases, could damage or destroy the firearm.
Additionally, SAAMI also says that we should not use 5.56 military ammo in rifles chambered for .223 Remington.
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Old February 8, 2013, 07:30 PM   #3
Mobuck
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I've used M193 in a couple of Savage bolt actions w/o any problems. I'd try it in my Howa/Wby Vanguard but that rifle has a very tight chamber and the surplus ammo I have doesn't chamber readily. I have no big urge to gall the bolt lugs/recesses by forcing the bolt closed so am just passing the M193 on to other more compromising rifles.
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Old February 9, 2013, 07:34 AM   #4
jehu
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Simple answer, NO! Do not risk your fine bolt action rifle just to shoot that cheap FMJ.
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Old February 9, 2013, 09:18 AM   #5
RonR6
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Don't take any chances on damaging your nice bolt action .223
Save the 193 for a 5.56 chambered rifle
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