55gr 5.56 NATO and .223 Remington Ammunition Comparison
.223 Remington and 5.56 NATO ammunition are some of the most produced
and consumed cartridges in the United States due in large part to the
AR-15 category of rifles. Factory .223 and 5.56 ammunition is also
relatively inexpensive when compared to other centerfire rifle
cartridges, which helps fuel the consumption of these cartridges.
Within the various types of .223 and 5.56 ammunition, bullet weights
of 55gr and 62gr are the most popular, thanks to the USGI M193 (55gr)
and M855 (62gr) 5.56 NATO rounds. While actual USGI M193 and M855 is
technically not available to the commercial market, commercial
ammunition manufacturers do produce ammunition to similar specifications
of M193 and M855 (at least with regards to muzzle velocity and
pressure).
I've had a few black rifles now and a couple AR's. It's just my experience but the guns with the 1:7 twist rates vs. the ones with the slower twists...there is absolutely no improvement in accuracy. In fact I am getting better results with the lighter 52gr. bullets in the slower twist rifles than the heavy ones in the fast twist barrels. YMMV.
As for bullet comparators, turning case necks, uniforming primer pockets...GAH. Screw that. I will do it for the M14 and hunting guns, but my black guns are for fun and practice and that's it.
I've had a few black rifles now and a couple AR's. It's just my experience but the guns with the 1:7 twist rates vs. the ones with the slower twists...there is absolutely no improvement in accuracy. In fact I am getting better results with the lighter 52gr. bullets in the slower twist rifles than the heavy ones in the fast twist barrels. YMMV.
ReplyDeleteAs for bullet comparators, turning case necks, uniforming primer pockets...GAH. Screw that. I will do it for the M14 and hunting guns, but my black guns are for fun and practice and that's it.