Range Report: Hornady 5.56mm 75 Grain TAP SBR

[Sensei]

For comparison (all velocities are with M4SDII):

DD 10.75" --- 75 TAP SBR 2226, 75 Gold Dot 2183, 77 IMI 2391 64 Gold Dot 2287 62 Mk318 2604

Sionics 11.5" -75 TAP SBR 2244, 75 Gold Dot 2273, 77 IMI 2456 64 Gold Dot 2479 62 Mk318 2741


So, yes, the 75 GDs are a bit faster in my tests than the 75 TAP SBR. Still almost 100fps slower than the referenced test.

Your numbers are very similar to mine. I got an average of 2170 out of a 10" SCAR and 2280 out of an 11.5" BCM with the TAP SBR. Those measurements are at the barrel using a magnetospeed. While that is on average 25-50 fps slower than most other 75 grain loads through those guns, the TAP SBR is noticeably quieter and softer shooting through a SF 556 RC2. It is also very accurate. I'll take those trade offs in a gun that will be used to engage targets at less than 100 yards; I bet they won't notice the difference after a center mass or head shot.

[MQ105]

More data:

Lot# 3162028

2214fps Scar 16, 10.5" barrel, suppressed. 2.5" 10 shot group @ 100 w/ Micro T-1, prone on mag



Competition Electronics Pro @ 10ft, 75deg, 138ft asl

[Sensei]

More data points. This time with a 10.5" LMT MRP SBR (1:7 twist) with and without a Surefire SOCOM RC-2 suppressor. 5 rounds unsuppressed was 2169 +/- 7 fps. Suppressed produced 2165 +/- 8 fps. I also shot 5 rounds of 75 grain TAP T2 unsuppressed and got 2423 +/- 19 fps. Recoil and flash was MAYBE a little less with the TAP T2. I'm not sure how I feel about giving up 250 fps to other 75 grain 5.56 loads assuming that most will expand down to 1800 fps or so. That means that the TAP 75 grain SBR expands out to 100 yards, but an extra 250 fps would give you another 85 yards to play with assuming a BC of 0.230. This load is clearly designed for very close encounters.