04/20/19 – Below are my results:
Rifle: AR-15 with a 16” FN barrel, 1/7 twist and a YHM Phantom QD suppressor.
Powder: Ramshot TAC
Bullets: Hornady 75 gr BTHP (P/N 2279)
Primers: WSR
COL & Crimp: 2.250” with light taper crimp
Cases: Mixed LC brass trimmed to 1.750”
Conditions: Overcast, 50-52 deg F, medium wind
Load Data*
- Ramshot: Start 21.7 gr (2582 fps) and Max 24.1 gr (2820 fps) – 24″ barrel, 1:12″ twist, WSR, 2.260”
- Hornady (9th Ed.): N/A
- Thehighroad forum: One stated 23.6 gr and another 23.9 gr, which supposedly is similar to MK-262 load.
- Brian Enos forum: Stated best performance between 23 – 24 grs.
Note * – Always verify load data for yourself, starting low and working up in safe increments. Published data varies from source-to-source, and subject to typos and transposing errors. Additionally, internet posts such as this are someone’s personal experience.
Here were my results, 5 shots each at 50 yds:
TAC (22.0 gr) – Avg 2408, ES 108, SD 40, Grp 1-1/4”
TAC (22.5 gr) – Avg 2467, ES 37, SD 13, Grp 7/8”
TAC (23.0 gr) – Avg 2516, ES 38, SD 16, Grp 1”
TAC (23.4 gr) – Avg 2570, ES 50, SD 24, Grp 7/8”
TAC (23.7 gr) – Avg 2594, ES 45, SD 17, Grp 7/8”
TAC (23.9 gr) – Avg 2603, ES 46, SD 18, Grp 1-5/8”
TAC (24.1 gr) – Avg 2651, ES 42, SD 16, Grp 5/8”
TAC (24.1 gr) – Avg 2634, ES 68, SD 25, Grp 1”
TAC (24.1 gr) – Avg 2643, ES 68, SD 22 (combine two 5 shot sets)
A few observations:
- I could not find much published data by bullet manufacturers, so I used Ramshot’s data and checked against a few forum postings that were within the max limit published by Ramshot.
- My best load (IMO) was 24.1 gr which produced 5/8” to ¾” groups at 50 yds with an average speed of 2643. This is 235 fps faster than the best I go do with BL-C(2) or CFE223, producing similar grouping results. I believe that this would equate to approximately 2925 fps from a 24” barrel.
- Of the three powders I tested with this bullet, TAC was by far the cleanest. Shooting suppressed is inherently more dirty, but I was pleasantly surprised to how clean my brass looked.
See results from BL-C(2) powder: 23.5 gr – Avg 2408, ES 43, SD 15, Group 0.75”
See results from CFE223 powder: 23.5 gr – Avg 2429, ES-65, SD-27, Group 1.00”
DISCLAIMER
The load data contained above was developed using specific components. Other components may not produce equivalent pressure or velocities; therefore, it is recommended that the user be familiar with the basic rules of reloading safety. If you choose to use any load data above, you are using at your own risk.
Always verify load data for yourself, starting low and working up in safe increments. Published data varies from source-to-source, and subject to typos and transposing errors. Additionally, internet posts such as this are someone’s personal experience. My recommendation is that you should always consult at least three sources of manufacturer’s ammunition and/or powder reloading data before reloading your own ammunition.