2018年12月4日 · The 5.56x45 denotes a whole family of cartridges with identical case dimensions. Strictly speaking, only a few 5.56x45 cartridges have been adopted for use by NATO. The standard full metal jacket 5.56x45 NATO cartridge is the SS109 penetrator or "green tip" which is loaded with a 62 grain bimetallic projectile with a steel core at the tip and a ...

rifles were chambered for M-193 ball ammo (5.56x45) that had exactly the same specifications as the commercial 223 Remington ammo. In 1980, the 5.56 NATO cartridge was approved for NATO forces which is notably different than 5.56x45 or 223 Rem cartridge. 1. Any rifle chambered for a 5.56 NATO will safely shoot 223 Rem or M193 5.56x45 ammo. 2.

2012年9月16日 · 223/5.56x45 I have had good luck accuracy wise with TAC and hornady v-max . Started mid recomended range and using 58 & 60 gr. v-max not much difference in group size barrel is 1 in 8 twist.

2022年2月28日 · I'm glad you keyed in on the 223 Rem, 5.56x45 M-193, and the 5.56 NATO as three separate cartridges because most people think the 5.56x45 and the 5.56 NATO are the same .... but they aren't. I posted the full story in the Forum Library but you probably don't have enough posts to access it.

2021年4月28日 · The 5.56x45 is the military designation and is loaded to higher pressure than 223. Military brass can be thicker so check case volume if you reload it. 5.56x45 chambers have a longer lead (jump to rifling) and heavier/longer bullets can cause over pressure problems in …

2019年8月7日 · Older USGI 5.56x45 (M-193) that used 55gr bullets are safe to shoot in any 223 Rem rifle. Only 5.56 ammo with 62 gr bullets, loaded to NATO standards and may be unsafe in 223 Rem rifles. NATO approved cartridges have a headstamp with a 2-digit year code plus a symbol that looks like circle with a plus sign …. like a view through a scope.

2006年8月31日 · Difference between 5.56 NATO & 5.56x45 Ammo. Jump to Latest 21 - 40 of 48 Posts. 1 2 3 ...

2015年1月11日 · When loading reformed .223 cases for the .20 Practical several would not extract/eject and chambering a loaded round even with a bolt action had noticeable resistance. The problem was that they were once fired, probably in a weapon intended for 5.56X45 having a generous sized chamber. The problem was solved by using a Redding .223 small base die.

2023年1月9日 · Because 5.56x45 USGI and NATO cases are thicker, they typically test about 1k psi higher than 223 Rem. BTW, a 5.56 USGI cartridge and a 55gr 223 Rem cartridge are identical. A 5.56x45 NATO case is the same but the bullet's ogive is …

2024年10月18日 · The 5.56x45 (M-193) is an older USGI 55gr cartridge that was used when the M-16 was first issued. M-193 ammo is still being produced at the Lake City Arsenal and it is safe to shoot in any 223 Rem, 5.56x45, or 5.56 NATO chambered rifle.