Thread: 10 Shot Load Development

Similar to how I do it. I do five for pressure signs at about 1% increments. Then load 4-5 lots of 3 at smaller% increments and chrony then onto paper with coloured tips and a long rest between shots @300m. I start from lowest to highest load, then highest to lowest, lowest to highest.
I then plot vertical dispersal and compare it to standard deviation of velocities of that charge weight.
I look for the load with the least vertical dispersion with the most consistent velocity.

I'm way too OCD though, and it's a massive chore.

Originally Posted by PERRISCICABA

Hey Beavis, great report. I have done it when i swap from Hornady to Lapua brass and work the treat. this process is better understand if shot a further distance to also check the POI variation, but, the way you done will work also. You got it right at the velocity variation, when you find the so called "flat spot" you get it in the very "middle" and work from there, at least it was what work for me, once you sort it out then the seating depth is a tune in point.
I am not an specialist by any means but keen to help if i can.

Good luck!

Mac

Result achieved from this method…

Attachment 89905

Sorry but the photos looks like have been drinking all together…

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