Hey all,
So I bought a chronograph and ran my latest reloads through it. Can you help me interpret the data?
I fired three loads of Varget at 44.4g, 44.5g, and 44.6g (each with federal brass, cci primers & 175g Sierra MatchKing in .308). I'm reloading with off the shelf Lyman and RCBS equipment and lee dies. I didn't seperate brass or bullets by volume or weight.
Its being shot out of a Rem700P, off a bench with rests at both ends on a virtually windless day.
I haven't played with getting closer to the lands because I want it to magazine feed so I've kept it at the book length.
I posted the velocities, group sizes, standard deviation etc.
I'm wanting to use this as my long range target round.
I'm thinking 44.6 grains is in a good spot.
Do you figure the velocities and deviations acceptable? If not, where should I start looking to improve?
Any help appreciated.
Thanks,
ST
***44.4 GRAINS***
GROUP1 shot at 100 yards
Shot 1 2702 fps
Shot 2 2718 fps
Shot 3 2728 fps
Shot 4 2726 fps
Shot 5 2764 fps
Avg Vel Grp1 2727.6 fps
5 Shot Group Size 1.2 inches
5 Shot Group MOA 1.256 MOA
GROUP2 shot at 100 yards
Shot 6 2710 fps
Shot 7 2784 fps
Shot 8 2812 fps
Shot 9 2799 fps
Shot 10 2821 fps
Avg Vel Grp2 2785.2 fps
5 Shot Group Size 0.547 inches
5 Shot Group MOA 0.573 MOA
Avg Vel Total 2756.4 fps
Velocity Spread 119 fps
10 Sht AVG Grp Sz 0.8735 inches
10 Shot AVG MOA 0.915 MOA
Bias Standard Dev 42.68 fps
***44.5 GRAINs***
GROUP1 shot at 100 yards
Shot 1 2821 fps
Shot 2 2821 fps
Shot 3 2821 fps
Shot 4 2801 fps
Shot 5 2775 fps
Avg Vel Grp1 2807.8 fps
5 Shot Group Size 0.56 inches
5 Shot Group MOA 0.586 MOA
GROUP2 shot at 100 yards
Shot 6 2754 fps
Shot 7 2702 fps
Shot 8 2669 fps
Shot 9 2655 fps
Shot 10 2629 fps
Avg Vel Grp2 2681.8 fps
5 Shot Group Size 0.992 inches
5 Shot Group MOA 1.039 MOA
Avg Vel Total 2744.8 fps
Velocity Spread 192 fps
10 Sht AVG Grp Sz 0.776 inches
10 Shot AVG MOA 0.812 MOA
Bias Standard Dev 71.15 fps
****44.6 GRAINS****
GROUP1 shot at 100 yards
Shot 1 2603 fps
Shot 2 2652 fps
Shot 3 2680 fps
Shot 4 2741 fps
Shot 5 2731 fps
Avg Vel Grp1 2681.4 fps
5 Shot Group Size 0.553 inches
5 Shot Group MOA 0.579 MOA
GROUP2 shot at 100 yards
Shot 6 2773 fps
Shot 7 2746 fps
Shot 8 2709 fps
Shot 9 2723 fps
Shot 10 2743 fps
Avg Vel Grp2 2738.8 fps
5 Shot Group Size 0.762
5 Shot Group MOA 0.798
Avg Vel Total 2710.1 fps
Velocity Spread 170 fps
10 Sht AVG Grp Sz 0.6575 inches
10 Shot AVG MOA 0.688 MOA
Bias Standard Dev 48.62 fps
So I bought a chronograph and ran my latest reloads through it. Can you help me interpret the data?
I fired three loads of Varget at 44.4g, 44.5g, and 44.6g (each with federal brass, cci primers & 175g Sierra MatchKing in .308). I'm reloading with off the shelf Lyman and RCBS equipment and lee dies. I didn't seperate brass or bullets by volume or weight.
Its being shot out of a Rem700P, off a bench with rests at both ends on a virtually windless day.
I haven't played with getting closer to the lands because I want it to magazine feed so I've kept it at the book length.
I posted the velocities, group sizes, standard deviation etc.
I'm wanting to use this as my long range target round.
I'm thinking 44.6 grains is in a good spot.
Do you figure the velocities and deviations acceptable? If not, where should I start looking to improve?
Any help appreciated.
Thanks,
ST
***44.4 GRAINS***
GROUP1 shot at 100 yards
Shot 1 2702 fps
Shot 2 2718 fps
Shot 3 2728 fps
Shot 4 2726 fps
Shot 5 2764 fps
Avg Vel Grp1 2727.6 fps
5 Shot Group Size 1.2 inches
5 Shot Group MOA 1.256 MOA
GROUP2 shot at 100 yards
Shot 6 2710 fps
Shot 7 2784 fps
Shot 8 2812 fps
Shot 9 2799 fps
Shot 10 2821 fps
Avg Vel Grp2 2785.2 fps
5 Shot Group Size 0.547 inches
5 Shot Group MOA 0.573 MOA
Avg Vel Total 2756.4 fps
Velocity Spread 119 fps
10 Sht AVG Grp Sz 0.8735 inches
10 Shot AVG MOA 0.915 MOA
Bias Standard Dev 42.68 fps
***44.5 GRAINs***
GROUP1 shot at 100 yards
Shot 1 2821 fps
Shot 2 2821 fps
Shot 3 2821 fps
Shot 4 2801 fps
Shot 5 2775 fps
Avg Vel Grp1 2807.8 fps
5 Shot Group Size 0.56 inches
5 Shot Group MOA 0.586 MOA
GROUP2 shot at 100 yards
Shot 6 2754 fps
Shot 7 2702 fps
Shot 8 2669 fps
Shot 9 2655 fps
Shot 10 2629 fps
Avg Vel Grp2 2681.8 fps
5 Shot Group Size 0.992 inches
5 Shot Group MOA 1.039 MOA
Avg Vel Total 2744.8 fps
Velocity Spread 192 fps
10 Sht AVG Grp Sz 0.776 inches
10 Shot AVG MOA 0.812 MOA
Bias Standard Dev 71.15 fps
****44.6 GRAINS****
GROUP1 shot at 100 yards
Shot 1 2603 fps
Shot 2 2652 fps
Shot 3 2680 fps
Shot 4 2741 fps
Shot 5 2731 fps
Avg Vel Grp1 2681.4 fps
5 Shot Group Size 0.553 inches
5 Shot Group MOA 0.579 MOA
GROUP2 shot at 100 yards
Shot 6 2773 fps
Shot 7 2746 fps
Shot 8 2709 fps
Shot 9 2723 fps
Shot 10 2743 fps
Avg Vel Grp2 2738.8 fps
5 Shot Group Size 0.762
5 Shot Group MOA 0.798
Avg Vel Total 2710.1 fps
Velocity Spread 170 fps
10 Sht AVG Grp Sz 0.6575 inches
10 Shot AVG MOA 0.688 MOA
Bias Standard Dev 48.62 fps