6.5 Creedmoor, Sierra 142 grain MatchKing, Reloader 17

[Praeger]

First round of load development for my AI AX 6.5 Creedmoor using 142 grain SMK and Reloader 17. No high pressure signs at 42.8 grains. The groups were all about 3/4 " (+/- 1/8" at 100 yards). I generally pay more attention to the SD and ES. So far I'm impressed with RL17, it is my first time using it. Next round will be in .1 grain increments from 42.4gr - 43.4gr, or until I see signs of high pressure.

Series	1	Shots:	5
Min	2716	Max	2752
Avg	2728	S-D	13.7
ES	36
Series	Shot	Speed
41.2	1	2722	ft/s
41.2	2	2726	ft/s
41.2	3	2716	ft/s
41.2	4	2727	ft/s
41.2	5	2752	ft/s

Series	2	Shots:	5
Min	2732	Max	2766
Avg	2750	S-D	14.9
ES	34
Series	Shot	Speed
41.4	1	2745	ft/s
41.4	2	2732	ft/s
41.4	3	2766	ft/s
41.4	4	2765	ft/s
41.4	5	2742	ft/s

Series	3	Shots:	5
Min	2742	Max	2765
Avg	2751	S-D	8.6
ES	23
Series	Shot	Speed
41.6	1	2754	ft/s
41.6	2	2747	ft/s
41.6	3	2742	ft/s
41.6	4	2765	ft/s
41.6	5	2750	ft/s

Series	4	Shots:	5
Min	2755	Max	2780
Avg	2768	S-D	9.7
ES	25
Series	Shot	Speed
41.8	1	2765	ft/s
41.8	2	2767	ft/s
41.8	3	2776	ft/s
41.8	4	2780	ft/s
41.8	5	2755	ft/s

Series	5	Shots:	5
Min	2779	Max	2797
Avg	2786	S-D	8.1
ES	18
Series	Shot	Speed
42.0	1	2782	ft/s
42.0	2	2793	ft/s
42.0	3	2797	ft/s
42.0	4	2780	ft/s
42.0	5	2779	ft/s

Series	6	Shots:	5
Min	2793	Max	2830
Avg	2808	S-D	16.8
ES	37
Series	Shot	Speed
42.2	1	2800	ft/s
42.2	2	2793	ft/s
42.2	3	2822	ft/s
42.2	4	2795	ft/s
42.2	5	2830	ft/s

Series	7	Shots:	5
Min	2802	Max	2829
Avg	2814	S-D	10.2
ES	27
Series	Shot	Speed
42.4	1	2819	ft/s
42.4	2	2829	ft/s
42.4	3	2815	ft/s
42.4	4	2802	ft/s
42.4	5	2809	ft/s

Series	8	Shots:	5
Min	2823	Max	2849
Avg	2833	S-D	10.2
ES	26
Series	Shot	Speed
42.6	1	2833	ft/s
42.6	2	2849	ft/s
42.6	3	2823	ft/s
42.6	4	2837	ft/s
42.6	5	2826	ft/s

Series	9	Shots:	5
Min	2831	Max	2887
Avg	2855	S-D	22.4
ES	56
Series	Shot	Speed
42.8	1	2865	ft/s
42.8	2	2831	ft/s
42.8	3	2837	ft/s
42.8	4	2887	ft/s
42.8	5	2856	ft/s

 

[Ritterbruder]

I did a ladder with RL-17 and found a similar node around 41.6 grains. All groups were 0.5-0.6 moa at 100 yards, which doesn't really tell much at such a short distance.

My velocities are a bit lower than yours though.

All 10-shot groups.

Hornady 140gr ELD
Lapua brass
CCI #400
24" barrel

41 gr
Avg: 2676.8
ES: 63
SD: 17.6

41.3 gr
Avg: 2693.5
ES: 37
SD: 11.7

41.6 gr
Avg: 2710.9
ES: 13
SD: 3.8

41.9 gr
Avg: 2733.8
ES: 30
SD: 7.8

42.2 gr
Avg: 2759.1
ES: 30
SD: 10.6

I'm hoping to find a second node at around 42.5 grains and I'll be happy.

 

[JSTARSZ]

That's pretty close to mine too - 24" Bartlein Barrel with 42.3 Grains of R17X

6.5mm Creedmoor 142GR Sierra BTHP - RL17 - 42.3 GR - 10-24-15/62 Degrees 50% Humdity
	Shot	Speed
	1	2829	ft/s
	2	2824	ft/s
	3	2841	ft/s
	4	2853	ft/s
	5	2825	ft/s
	6	2824	ft/s
	7	2827	ft/s
	8	2808	ft/s
	9	2831	ft/s
	10	2840	ft/s
	11	2850	ft/s
	12	2833	ft/s
	13	2823	ft/s
	14	2817	ft/s
	15	2802	ft/s
Min	2802	Max	2853
Avg	2828	S-D	13.9
ES	51