Initial load development w/MVP Varmint 5.56

[benchracer]

Results with the Hornady 75 BTHP and RL-17:

View attachment 51413

View attachment 51416

View attachment 51418

View attachment 51419

Results with 75 BTHP @ 27.1 RL-17:

Min 2765
Max 2813
Avg 2795
ES 48
SD 21

Min 2753
Max 2797
Avg 2780
ES 44
SD 17

 

[benchracer]

Results with the Hornady 75 BTHP and Superformance:

View attachment 51420

View attachment 51421

View attachment 51422

View attachment 51423

View attachment 51424

View attachment 51425

Results with 75 BTHP @ 26.5 Superformance:

Min 2552
Max 2586
Avg 2571
ES 34
SD 14

Min 2570
Max 2606
Avg 2582
ES 36
SD 14

 

[benchracer]

I had decided to test the 75 BTHP with RL-17 and Superformance to see if the heavier bullets would benefit from using slower powders. Though both RL-17 and Superformance appear to have some potential in terms of consistency, neither one offers enough velocity to make them worthwhile, IMO. I believe I can do better with CFE 223 and IMR 8208 XBR.

 

[benchracer]

I have had excellent results with 53 VMAX's and CFE 223, but no pics of the load development process with them. I will try to get some pics of groups fired at 200 and 300 yards the next time I am out, probably after Labor Day...

Load workup is in progress with the new 69 TMK's and CFE 223. Will post pics when I have something.

I am also working with 75 AMAX's loaded to 2.455 COAL using CFE 223, RL-17, and Superformance.

I will be gathering chrono data for my final loads with the 53 VMAX, 68 BTHP, 69 SMK, and 75 BTHP tomorrow. Will post that data when I have it.

The chrono results with the 53 VMAX @ 27.5 CFE 223 were:

Min 3160
Max 3219
Avg 3193
ES 59
SD 21

Min 3150
Max 3215
Avg 3175
ES 65
SD 27


The chrono results with the 75 BTHP @ 26.2 CFE 223 were:

Min 2913
Max 2985
Avg 2943
ES 72
SD 29

Min 2905
Max 2990
Avg 2951
ES 85
SD 35


The chrono results with the 69 TMK @ 26.8 CFE 223 were:

Min 3032
Max 3099
Avg 3049
ES 67
SD 28

Min 2990
Max 3059
Avg 3031
ES 69
SD 25