WS6
11-30-07, 19:57
I have seen this question asked and "answered" over and over. I decided to answer it for myself.
Materials:
Colt HBAR 6601 AR-15A2
PMC 55gr .223 ammunition
M855 Winchester ammunition
Hornady 40gr VMAX ammuition (advertised at 3800fps)
3/8" thick mild steel plate
Spray paint
Pine 2x4's that have sat outside for approx. 2 months.
I have heard it said that the velocity of M193 or .223 55gr will allow it to out penetrate M855 within 25-100yards in steel. After that, the M855's steel core starts to matter.
So I put that "conventional wisdom" (Velocity is what penetrates) to the test. Here are my test results:
i18.tinypic.com/72r9l4h.jpg
i4.tinypic.com/86o289u.jpg
i3.tinypic.com/6jd0ept.jpg
i14.tinypic.com/6wzr8fn.jpg
i12.tinypic.com/8e8xh5w.jpg
PS. Shooting offhand with A2 sights at 140 yards at dusk was a challenge, but I managed to tag the plate twice (out of something like 6 or 7 shots [B)])
This being said I could not get ahold of XM193 for the test, however PMC .223 is VERY close as you can see from these chronograph tests.
PMC .223 Chronograph data (http://www.ar15.com/forums/topic.html?b=3&f=16&t=292755)
M193 Chrono data (LC) (http://www.ar15.com/forums/topic.html?b=3&f=16&t=349824)
If the M855 does it at 140 yards and the PMC wont at 25, I feel that proves the point even IF one wants to argue the minute velocity difference with XM193 vs. the PMC I used.
tried some Q3131 and it DID suprise me, results can be found here: http://ar15.com/forums/topic.html?b=3&f=16&t=351903
Materials:
Colt HBAR 6601 AR-15A2
PMC 55gr .223 ammunition
M855 Winchester ammunition
Hornady 40gr VMAX ammuition (advertised at 3800fps)
3/8" thick mild steel plate
Spray paint
Pine 2x4's that have sat outside for approx. 2 months.
I have heard it said that the velocity of M193 or .223 55gr will allow it to out penetrate M855 within 25-100yards in steel. After that, the M855's steel core starts to matter.
So I put that "conventional wisdom" (Velocity is what penetrates) to the test. Here are my test results:
i18.tinypic.com/72r9l4h.jpg
i4.tinypic.com/86o289u.jpg
i3.tinypic.com/6jd0ept.jpg
i14.tinypic.com/6wzr8fn.jpg
i12.tinypic.com/8e8xh5w.jpg
PS. Shooting offhand with A2 sights at 140 yards at dusk was a challenge, but I managed to tag the plate twice (out of something like 6 or 7 shots [B)])
This being said I could not get ahold of XM193 for the test, however PMC .223 is VERY close as you can see from these chronograph tests.
PMC .223 Chronograph data (http://www.ar15.com/forums/topic.html?b=3&f=16&t=292755)
M193 Chrono data (LC) (http://www.ar15.com/forums/topic.html?b=3&f=16&t=349824)
If the M855 does it at 140 yards and the PMC wont at 25, I feel that proves the point even IF one wants to argue the minute velocity difference with XM193 vs. the PMC I used.
tried some Q3131 and it DID suprise me, results can be found here: http://ar15.com/forums/topic.html?b=3&f=16&t=351903