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Is this the same as the 5.56 70 TSX?
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Are you talking about M855A1? Looks like M855 (Green Tip) but instead of green paint it is a swaged in metal point? If so, no, it is not a 70gn TSX.
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Yes, from what I understand, 5.56 brown tip or 5.56 "optimized" uses the 70gr TSX. I have not seen any published info that states the particulars, I have only read where a few people mention this ammo and those who know about it tend to be right. ETA: Also found this: http://www.ar15.com/forums/t_3_16/378548_.html
Last edited by CBMJR; 12/22/14.
John 8:12 "I am the light of the world. Whoever follows me will never walk in darkness, but will have the light of life."
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I would not think they would get much expansion with the 70 grain TSX at 14.5 inch barrel speed.
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Campfire Tracker
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hitting some bone makes TSXs work best, but I use the 62 gr. variety mostly.
but I have read elsewhere that the .gov has been using TSXs. it is supposed to handle barriers pretty good
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Yeah, I think they were more concerned with barrier penetration than expansion.
John 8:12 "I am the light of the world. Whoever follows me will never walk in darkness, but will have the light of life."
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Campfire 'Bwana
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Campfire 'Bwana
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I would not think they would get much expansion with the 70 grain TSX at 14.5 inch barrel speed. Expansion can be taylored to the velocity.
I got banned on another web site for a debate that happened on this site. That's a first
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70gr TSX's upset reliably to just over 300 meters from 10.5in guns..... For conversation......
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Is that the commercially available 70 gr or something optimized for the predicted impact velocities of short barrels?
Blackhills has made it clear 50 tsx they use is not the off the shelf 50gr bullet.
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"In rifle work, group size is of some interest...but it is well to remember that a rifleman does not shoot groups, he shoots shots." Jeff Cooper
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70gr TSX's upset reliably to just over 300 meters from 10.5in guns..... For conversation......
I have always avoided the 70TSX as I get small exit holes with even the 62 TSX's out of a 16 inch barrel, even hitting bone.
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Is that the commercially available 70 gr or something optimized for the predicted impact velocities of short barrels?
Blackhills has made it clear 50 tsx they use is not the off the shelf 50gr bullet.
The 70gr TSX will upset to 1,800 fps or a little lower. It's standard. BlackHills has the 50gr Optimized TSX and it was designed to address the tendency of regular Barnes bullets to shed their petals through glass and sheet metal. It only opens down to around 2,300 fps. That is not such a big deal for police as most shots are within 200m and the added performance against glass and metal is worth it, especially from short barrels.
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