First off im very new at this and attempting to figure my way though this. A little back story I am working on developing custom loads for my compition rifle. On a fourm another guy had a contour plot showing ideal loads based off his testing and I was hoping to replicate it (not able to use his program). For the inputs I would have 2 on the axis. One being the powder weight (in grains – gr) from 44.6 to 45.4 in 0.2 incriments. The second axis would be the bullet seating depth. This would be from 2.250" to 2.290" in 0.01" incraments. For the date i have loaded multiple batches of rounds. Out of these batches I will shoot and get a total group size for each.
Example:
44.6gr @ 2.290" = 0.912 MOA
44.8gr @ 2.290" = 0.661 MOA
45.0gr @ 2.290" = 0.995 MOA
45.2gr @ 2.290" = 1.200 MOA
45.4gr @ 2.29" = 0.663 MOA
I would continue this for each grain weight at the same seating depth. Then i would repeat the process with each grain weight at the next seating depth and so on untill I hvae gotten a group size for each combinination. I keep track of all of this on an excel spreadsheet and hope i can input that info as I would do this multiple times with different rifles and ammo load combinations.
(MOA is Minute of angle, used to measeure group size at any set distance, 1 MOA – 1.03" @ 100 yards)
I have added a photo of the plot I saw on the fourm. As it shows one axis has his powder weight, the other shows the seating depth (CBTO), the contour lines show group size and there are circles on there that show the measured group size for each batch of ammo. As the photo shows the smallest group size is trending towards 2.320" with aprox 44.6gr of powder. This would allow me to find the best combination of powder weight and seating depth to allow for the best group and have an allowable level or error between each batch.

I have spend a few hours trying to figure this out and have not nowhere. Is this something that would be easy to do and im just not getting it? If anyone could help me with this it would be greatly appreciated! Thank you!First off im very new at this and attempting to figure my way though this. A little back story I am working on developing custom loads for my compition rifle. On a fourm another guy had a contour plot showing ideal loads based off his testing and I was hoping to replicate it (not able to use his program). For the inputs I would have 2 on the axis. One being the powder weight (in grains – gr) from 44.6 to 45.4 in 0.2 incriments. The second axis would be the bullet seating depth. This would be from 2.250" to 2.290" in 0.01" incraments. For the date i have loaded multiple batches of rounds. Out of these batches I will shoot and get a total group size for each.
Example:
44.6gr @ 2.290" = 0.912 MOA
44.8gr @ 2.290" = 0.661 MOA
45.0gr @ 2.290" = 0.995 MOA
45.2gr @ 2.290" = 1.200 MOA
45.4gr @ 2.29" = 0.663 MOA
I would continue this for each grain weight at the same seating depth. Then i would repeat the process with each grain weight at the next seating depth and so on untill I hvae gotten a group size for each combinination. I keep track of all of this on an excel spreadsheet and hope i can input that info as I would do this multiple times with different rifles and ammo load combinations.
(MOA is Minute of angle, used to measeure group size at any set distance, 1 MOA – 1.03" @ 100 yards)
I have added a photo of the plot I saw on the fourm. As it shows one axis has his powder weight, the other shows the seating depth (CBTO), the contour lines show group size and there are circles on there that show the measured group size for each batch of ammo. As the photo shows the smallest group size is trending towards 2.320" with aprox 44.6gr of powder. This would allow me to find the best combination of powder weight and seating depth to allow for the best group and have an allowable level or error between each batch.

I have spend a few hours trying to figure this out and have not nowhere. Is this something that would be easy to do and im just not getting it? If anyone could help me with this it would be greatly appreciated! Thank you! First off im very new at this and attempting to figure my way though this. A little back story I am working on developing custom loads for my compition rifle. On a fourm another guy had a contour plot showing ideal loads based off his testing and I was hoping to replicate it (not able to use his program). For the inputs I would have 2 on the axis. One being the powder weight (in grains – gr) from 44.6 to 45.4 in 0.2 incriments. The second axis would be the bullet seating depth. This would be from 2.250" to 2.290" in 0.01" incraments. For the date i have loaded multiple batches of rounds. Out of these batches I will shoot and get a total group size for each.
Example:
44.6gr @ 2.290" = 0.912 MOA
44.8gr @ 2.290" = 0.661 MOA
45.0gr @ 2.290" = 0.995 MOA
45.2gr @ 2.290" = 1.200 MOA
45.4gr @ 2.29" = 0.663 MOA
I would continue this for each grain weight at the same seating depth. Then i would repeat the process with each grain weight at the next seating depth and so on untill I hvae gotten a group size for each combinination. I keep track of all of this on an excel spreadsheet and hope i can input that info as I would do this multiple times with different rifles and ammo load combinations.
(MOA is Minute of angle, used to measeure group size at any set distance, 1 MOA – 1.03" @ 100 yards)
I have added a photo of the plot I saw on the fourm. As it shows one axis has his powder weight, the other shows the seating depth (CBTO), the contour lines show group size and there are circles on there that show the measured group size for each batch of ammo. As the photo shows the smallest group size is trending towards 2.320" with aprox 44.6gr of powder. This would allow me to find the best combination of powder weight and seating depth to allow for the best group and have an allowable level or error between each batch.

I have spend a few hours trying to figure this out and have not nowhere. Is this something that would be easy to do and im just not getting it? If anyone could help me with this it would be greatly appreciated! Thank you! contour, plot, 3d plots MATLAB Answers — New Questions

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