OP,
Effectiveness of 5.56MM ammo on flesh & bone targets is very dependent on the bullet used. The 62GR. TSX/TAC-X bullet (both are the same bullet) is one of the best out there for 5.56MM use. IMO, the 62GR. TSX is just a little more accurate than the 70GR. TSX bullet used in the DOD 70GR. 5.56MM Optimized brown tip X135 load. But the heavier 70GR. TSX bullet will give you a bit more effective range especially from short 10" barrel weapons. I have fired 1000s of 0.224" TSX/TTSX 5.56MM loads and will fire 1000s more given the opportunity. Most of the factory TSX loads I have used have the bullet seated to 2.245" COAL. Barnes has stated that their TSX bullets like quite a bit of bullet jump. As stated above, Barnes has both .223 pressure & 5.56MM NATO pressure load data specific to different barrel lengths on the website. HTH
Water-shot expansion test of 62GR. TSX bullet:
Groups
[email protected] from a very well used 10.0" Colt M4 & a new 10.5" Noveske N4:
5.56MM 70GR. TSX group
[email protected] from Colt 14.5" barrel with M4 can attached: This barrel has a very long throat from hard usage which supports Barnes statement that their TSX bullets like longer bullet jump.
Most of the factory .223/5.56MM TSX cartridges I have used are 2.245" COAL. The DOD 70GR. TSX 5.56MM Optimized brown tip X135 cartridge will expand out to approx. 300yds. when fired from a 10.3" MK18 or 10.5" HK416, approx. 400yds. from the standard 14.5" M4.
