Ok, fun day at the range. Poor guy sharing my banks of shooting lanes with his College level competition air rifle (ANSCHÜTZ, I think?) had to put up with my SBR unsuppressed (mostly ). But I didn't want to clutter up Molon's thread on the Hornady TAP SBR any more than we did. But there was discussion about the Hornady TAP SBR ammo and how it would run differently in a SBR - all Molon had to test with was a 14½" barrel and supposedly the TAP SBR is designed for 10½-12" barrels.

Anyways... interesting data. I did NOT do anything for accuracy as Molon can and does do a MUCH better job than I ever could. But, with my magnetospeed chrony I was able to get some good info. I ended up testing a number of different loads:

Winchester 5.56 55gr FMJ (bulk white box)
Series, 1, Shots:, 5
Min,2660, Max,2794
Avg,2739 ,S-D,51.7
ES , 134

Series,Shot,Speed
1, 1, 2660, ft/s
1, 2, 2775, ft/s
1, 3, 2727, ft/s
1, 4, 2794, ft/s
1, 5, 2741, ft/s


my plinking reloads - CFE223 powder with Hornady 55gr FMJ
Series, 2, Shots:, 5
Min,2190, Max,2313
Avg,2220 ,S-D,51.8
ES , 123

Series,Shot,Speed
2, 1, 2313, ft/s
2, 2, 2200, ft/s
2, 3, 2195, ft/s
2, 4, 2190, ft/s
2, 5, 2206, ft/s

PMC 223 55gr FMJ
Series, 3, Shots:, 5
Min,2322, Max,2433
Avg,2369 ,S-D,55.9
ES , 111

Series,Shot,Speed
3, 1, 2427, ft/s
3, 2, 2340, ft/s
3, 3, 2324, ft/s
3, 4, 2322, ft/s
3, 5, 2433, ft/s


Black Hills 5.56 77gr OTM
Series, 4, Shots:, 5
Min,2318, Max,2374
Avg,2346 ,S-D,22.8
ES , 56

Series,Shot,Speed
4, 1, 2318, ft/s
4, 2, 2374, ft/s
4, 3, 2353, ft/s
4, 4, 2328, ft/s
4, 5, 2358, ft/s

Hornady TAP 223 75gr
Series, 5, Shots:, 5
Min,2243, Max,2273
Avg,2259 ,S-D,14.7
ES , 30

Series,Shot,Speed
5, 1, 2243, ft/s
5, 2, 2268, ft/s
5, 3, 2273, ft/s
5, 4, 2270, ft/s
5, 5, 2244, ft/s

Hornady TAP 5.56 SBR 75gr
Series, 6, Shots:, 5
Min,2170, Max,2188
Avg,2178 ,S-D, 7.4
ES , 18

Series,Shot,Speed
6, 1, 2184, ft/s
6, 2, 2179, ft/s
6, 3, 2170, ft/s
6, 4, 2173, ft/s
6, 5, 2188, ft/s

I was a little surprised at the TAP SBR... I thought it was gonna be faster. But, it is a 75gr bullet and what surprised me more was the data... the SD and ES numbers are outstanding... the consistency was extremely good. I need to work on my reloads to get my numbers down, but in my defense they are just a 'steel plate at the range' plinking round (100yrd). Thi sfall maybe I'll see how it does in the home made gel...