The 55 grain FMJ has a poor reputation for defeating light barriers. I sincerely doubt you are going to carry two different bullet weights into combat. (I'm a son of an old Navy Rifle Team/Underwater Demolition Team member) that fought in both WW2 and Korea. I learned at his knee. I'm also an old Vietnam era Navy Veteran.
The 55 grain 5.56 x 45 has a bad reputation when it comes to passing through anything heavier than Gypsum board walls. When heavy, thick barriers are encountered, a heavier bullet is required. The 5.56 x 45's limitations are well known. I don't want to "spray and pray" hoping that my battle rifle will be effective.
55 grain FMJ has a poor reputation for defeating light barriers.
True, however the current issue 62 grain steel core round works acceptably in that duty if given the right consideration. Lightweight and velocity with a hard core is how barrier penetration is done.
As part of a firepower demonstration during various parts of my career it was common to chop down various barriers with service weapons, and the 5.56mm worked much better than many sources would give it credit for. Common cinderblock walls for example are not cover, they are concealment. A C9 (M249) will cut a man sized mousehole through one of these walls in a a very short time.
This video is representative but does get the point across, the cinder block wall is sand filled for additional protection, but notice the debris coming out the back side of the wall isn't just sparkles and pixie dust.
Jump to 1 minute 47 second for 5.56mm
The barrier penetration properties is the main reason why I would not consider a 5.56mm rifle for a "home defense" concept, unless fired in the basement, any stray rounds would shoot through the wood and sheet rock construction of my home and would almost certainly enter a neighbor dwelling
Sheetrock (drywall) doesn’t slow any round down much. If you shoot in the house, walls will not stop any serious round.
Twelve pine boards will not stop a .223 round.
Shooting stuff is fun.
- Darren 1 PL West Nova Scotia Regiment 2000-2003
1 BN Princess Patricia's Canadian Light Infantry 2003-2013
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Last edited by Sentryduty; 03-30-2016 at 05:37 PM.
- Darren 1 PL West Nova Scotia Regiment 2000-2003
1 BN Princess Patricia's Canadian Light Infantry 2003-2013
I read a comparison on feedback with the 5.56 V's the 308 and getting through the mud walls also the 45 ACP V's the 9mm both the heavier calibers were favored by the troops for stopping power and penetration and of course the 50 cal is still the Ma-Deuce of the battlefield
PM
Originally Posted by carwashchris
