Hey everyone, I was recently turned on to a new way (new to me atleast) of doing a load development. Wanted to see if anyone else has done it and their thoughts.
***I've attached a screen shot of the excel sheet***
Load up 5 rounds over the course of set Min-Max charge weight. Loading in .2/.3 grains.
Shoot over chronograph (Magnetospeed in my case)
Plot the data on to a excel sheet and see where the data kinda flat spots (there's the node). Also pay alot of attention to the ES/SD's as the low ES/SD is what you are looking for.
After a node is set load in .1 increments .2 up and below the node. Shoot 10 rounds and record the information. This test just confirms the data in the excell sheet.
Then once the charge weight is found, it's time to play with the seating depth.
I jumped around randomly choosing the cartridge and waiting 2 mins between shots. Barrel wasn't even really warm when I check it, so 2min is over kill.
Then I went all nerd and graphed the velocities that I recorded over a magnetospeed as well as the ES/SD. Steve at 6.5guys is the one I got the excel sheet/idea from. I downloaded his and put my information in, so prop goes to him. It honestly makes things alot easier to see for sure. 42.1 and 42.3 has a wide note it appears. However my velocity is not where I want it to be at. Then at 42.7 and 43.1 show low ES/SD as well how ever they are not in a wide node. My concern is temperature effecting the rounds so that they shoot (have high SD/ES) like the charge weights on each side of them. Basically if it got down to 40 degrees, the temperature would effectively lower my charge weight from 42.7 to 42.5. However it's just a theory, only one way to test the idea.
Since the barrel is still new, I'll load up 42.1 42.2 and 42.3 in 10 rounds and shoot those to see how the SD/ES are. Whatever the winners is of that one, load up 5 rounds at different seating depths.
The two charge weights that got chopped off at 42.9 (top) and 41.9 (bottom)
***I've attached a screen shot of the excel sheet***
Load up 5 rounds over the course of set Min-Max charge weight. Loading in .2/.3 grains.
Shoot over chronograph (Magnetospeed in my case)
Plot the data on to a excel sheet and see where the data kinda flat spots (there's the node). Also pay alot of attention to the ES/SD's as the low ES/SD is what you are looking for.
After a node is set load in .1 increments .2 up and below the node. Shoot 10 rounds and record the information. This test just confirms the data in the excell sheet.
Then once the charge weight is found, it's time to play with the seating depth.
I jumped around randomly choosing the cartridge and waiting 2 mins between shots. Barrel wasn't even really warm when I check it, so 2min is over kill.


Then I went all nerd and graphed the velocities that I recorded over a magnetospeed as well as the ES/SD. Steve at 6.5guys is the one I got the excel sheet/idea from. I downloaded his and put my information in, so prop goes to him. It honestly makes things alot easier to see for sure. 42.1 and 42.3 has a wide note it appears. However my velocity is not where I want it to be at. Then at 42.7 and 43.1 show low ES/SD as well how ever they are not in a wide node. My concern is temperature effecting the rounds so that they shoot (have high SD/ES) like the charge weights on each side of them. Basically if it got down to 40 degrees, the temperature would effectively lower my charge weight from 42.7 to 42.5. However it's just a theory, only one way to test the idea.
Since the barrel is still new, I'll load up 42.1 42.2 and 42.3 in 10 rounds and shoot those to see how the SD/ES are. Whatever the winners is of that one, load up 5 rounds at different seating depths.
The two charge weights that got chopped off at 42.9 (top) and 41.9 (bottom)