6.5 ROBERTS IMPROVED
The following data was developed in a rifle based on a HALL action. Basically, all we did was open the 257 Roberts case neck to take a 264 caliber bullet, and gave it an Ackley Improved look.
All cases are Remington and Federal 210 primers.
All groups are 5 shots at 100 yards.
|
POWDER |
VELOCITY |
GROUP |
BULLET |
|
44.O VARGET |
3167 |
1.556 |
NORMA 77 GR SP |
|
46.0 |
3376 |
0.892 |
|
|
47.0 |
3474 |
1.992 |
|
|
49.0 |
3660 |
0.698 |
|
|
51.0 |
3751 |
1.226 |
|
|
40.0 VVN 135 |
2820 |
0.688 |
SIERRA 120 MATCH KING |
|
41.0 |
2877 |
0.379 |
|
|
42.0 |
2948 |
1.034 |
|
|
43.0 |
3029 |
0.463 |
|
|
42.0 VVN 140 |
2914 |
0.679 |
|
|
43.0 |
2970 |
0.696 |
|
|
43.0 VVN 150 |
2895 |
0.437 |
|
|
44.0 |
2957 |
0.894 |
|
|
45.0 |
3019 |
0.342 |
|
|
46.0 |
3106 |
0.566 |
|
|
49.0 VVN 160 |
2973 |
0.524 |
|
|
50.0 |
3040 |
0.931 |
|
|
51.0 |
3063 |
0.243 |
|
|
52.0 |
3123 |
0.767 |
|
|
52.0 VVN 165 |
3015 |
0.566 |
|
|
53.0 |
3085 |
0.459 |
|
|
54.0 |
3158 |
0.470 |
|
|
42.0 RELOADER 15 |
2908 |
0.361 |
|
|
43.0 |
2935 |
0.518 |
|
|
44.0 |
2982 |
0.575 |
|
|
45.0 |
3067 |
0.578 |
|
|
46.0 |
3177 |
0.723 |
|
|
47.0 |
3241 |
0.508 |
|
|
50.0 RELOADER 19 |
3098 - 3092 |
0.348 – 0.398 |
2 GROUPS CONTROL |
|
51.5 |
3145 |
0.350 |
|
|
52.5 |
3245 |
0.451 |
|
|
53.5 |
3320 |
0.821 |
|
|
52.0 RELOADER 22 |
3071 |
0.521 |
|
|
53.0 |
3158 |
0.430 |
|
|
51.0 H4831 |
0.456 |
3020 |
|
|
52.0 |
3089 |
0.326 |
|
|
53.0 |
3154 |
0.760 |
|
|
47.0 H4350 |
2950 |
0.276 |
|
|
48.0 |
3000 |
0.739 |
|
|
49.0 |
3081 |
0.231 |
|
|
50.0 |
3152 |
0.364 |
|
|
51.0 H450 |
3070 |
0.786 |
|
|
52.0 |
3126 |
0.584 |
|
|
46.0 H414 |
2892 |
0.444 |
|
|
47.0 |
2955 |
0.944 |
|
|
43.0 H4350 |
2570 |
0.227 |
SIERRA 140 MATCH KING |
|
43.8 |
2650 |
0.411 |
|
|
44.6 |
2723 |
0.334 |
|
|
45.4 |
2794 |
0.452 |
|
|
46.2 |
2843 |
0.216 |
|
|
47.0 |
2897 |
0.906 |
|
|
43.0 H450 |
2551 |
0.690 |
|
|
44.0 |
2596 |
0.342 |
|
|
45.0 |
2642 |
0.647 |
|
|
46.0 |
2699 |
0.572 |
|
|
47.0 |
2770 |
0.385 |
|
|
48.0 |
2823 |
0.723 |
|
|
49.0 |
2844 |
0.768 |
|
|
50.0 |
2898 |
0.583 |
|
|
51.0 |
2976 |
0.723 |
|
|
52.0 |
3017 |
0.732 |
|
|
43.0 H414 |
2665 |
0.236 |
|
|
44.0 |
2733 |
0.454 |
|
|
45.0 |
2796 |
0.540 |
|
|
46.0 |
2864 |
0.414 |
|
|
47.0 |
2942 |
0.429 |
|
|
39.0 H4895 |
2669 |
0.434 |
|
|
40.0 |
2746 |
0.337 |
|
|
41.0 |
2804 |
0.407 |
|
|
38.0 VARGET |
2598 |
0.381 |
|
|
39.0 |
2676 |
0.249 |
|
|
40.0 |
2734 |
0.352 |
|
|
41.0 |
2804 |
0.357 |
|
|
42.0 |
2816 |
0.629 |
|
|
43.0 |
2885 |
0.459 |
|
|
47.0 H4831 |
2766 |
0.469 |
|
|
48.0 |
2824 |
0.189 |
|
|
49.0 |
2895 |
0.326 |
|
|
50.0 |
2954 |
0.454 |
|
|
51.0 |
2962 |
0.645 |
|
|
39.0 RELOADER 12 |
2667 |
0.598 |
|
|
40.0 |
2695 |
0.324 |
|
|
40.0 RELOADER 15 |
2633 |
0.442 |
|
|
41.0 |
2683 |
0.401 |
|
|
42.0 |
2734 |
0.430 |
|
|
43.0 |
2828 |
0.586 |
|
|
47.0 RELOADER 19 |
2796 |
0.361 |
|
|
48.0 |
2862 |
0.737 |
|
|
49.0 |
2905 |
0.396 |
|
|
50.0 |
2964 |
0.650 |
|
|
51.0 |
3020 |
0.782 |
|
|
52.0 |
3081 |
0.673 |
|
|
49.0 RELOADER 22 |
2847 |
0.874 |
|
|
50.0 |
2923 |
0.8.26 |
|
|
51.0 |
2991 |
0.660 |
|
|
52.0 |
3042 |
0.701 |
|
|
47.0 VVN 165 |
2665 |
0.374 |
|
|
48.0 |
2724 |
0.425 |
|
|
49.0 |
2776 |
0.781 |
|
|
50.0 |
2859 |
0.636 |
|
|
51.0 |
2910 |
0.8.34 |
|
|
52.0 |
2977 |
0.335 |
|
|
53.0 |
3003 |
0.918 |
|
|
49.0 VVN 160 |
2857 |
0.944 |
|
|
50.0 |
2926 |
0.808 |
|
|
51.0 |
3066 |
1.432 |
|
|
44.0 VVN 150 |
2838 |
0.935 |
|
|
45.0 |
2933 |
0.512 |
|
|
46.0 |
2953 |
0.757 |
|
|
37.0 VVN 140 |
2531 |
0.359 |
|
|
38.0 |
2581 |
0.522 |
|
|
39.0 |
2631 |
0.489 |
|
|
40.0 |
2656 |
0.319 |
|
|
41.0 |
2719 |
0.464 |
|
|
42.0 |
2774 |
0.597 |
|
|
38.0 VVN 135 |
2636 |
0.404 |
|
|
39.0 |
2686 |
0.537 |
|
|
40.0 |
2739 |
0.564 |
|
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