OCW Round Robin Confusion

[skiuphill]

I'm shooting a 300 WSM Ridgeline and I'm trying RL17 with LRX 175's. I seated the bullets so they were .05 off the lands. I did a round robin OCW session today at the range and got results that I cannot figure out. I have used round robin with several other powders and bullets and was able to find the median result and find a good standard for the powder and bullet. I attached an image with the "mapping" of the groups. Each dot represents each three shot group average and each dot is labeled with the powder charge. I know not to pay much attention to group size when doing RR but the two circled numbers are 3/4" groups... the other groups are 1 - 1 1/2" groups. If anyone can give me insight on these groups please help. My brain cannot calculate! Thanks in advance if you have insight.

 

[airmonkey13]

The only thing I can think of is you have nodes at 61 grains and 65 grains. When I have been testing. I have seen at least two nodes in my workup. Any idea on the speeds from a chrono?

 

[47guy]

need to see a picture of the actual target you shot to really help you

 

[skiuphill]

I decided to try HV100 and it helped to go with a slower powder. This is still LRX 175's, CA Ridgeline, 300 WSM, 100 yard shots. Let me know what you think about these two targets shot in a round robin style.

 

[skiuphill]

I did some shooting today and have two more targets. Sorry for the rough looking targets but I think I now have found a good node. The node I'm thinking I found for HV100 is at 63, 63.2, and 63.5. What would the best plan be to work through the node that I have identified? All of my shots with the HV100 LRX 175's were seated .03 off the lands. Thanks in advance.

 

[Precision Underground]

I think it would be much easier to read if you would use consistent dots(stickers) lined up horizontally. You are looking for charges that shoot alike. When you are shooting those different charges at targets with different appearances and locations it muddies up the results in my opinion. When I do an OCW I make all of my targets exactly alike and as close together as possible. This make it a lot easier to read and also cuts down on any bad data from having to change positions to move to the next aiming point as well as bad data from one aiming point looking different than another.