SGJennings
New member
Here is one-half of a velocity map for Benchmark and LT-32 in my 220 Beggs. Probably very close for the 22-100. You might have to blow it up some to see it. If anyone wants the raw Excel file, just PM me.
It shows velocity for 4 loads at 0.3 grain increments at competitive velocities. I did 3 shots at each 0.3 grain increment. I plotted the average velocity for each increment and did a linear regression to show how velocity varies. The "scaled" versions at the bottom tell the story pretty plainly. You can see the slope of the line and the R^2 value in the right side of those charts. The slow shows you how velocity grows per tenth of a grain. R^2 is the coefficient of determination which, waving my hands a bit (a lot), is a percentage confidence.
http://i52.photobucket.com/albums/g39/Greg_Jennings/PPC/image002_zpsb310b0c9.jpg
PS: Thanks Sam! It is good to work with a PhD radiochemist.
It shows velocity for 4 loads at 0.3 grain increments at competitive velocities. I did 3 shots at each 0.3 grain increment. I plotted the average velocity for each increment and did a linear regression to show how velocity varies. The "scaled" versions at the bottom tell the story pretty plainly. You can see the slope of the line and the R^2 value in the right side of those charts. The slow shows you how velocity grows per tenth of a grain. R^2 is the coefficient of determination which, waving my hands a bit (a lot), is a percentage confidence.
http://i52.photobucket.com/albums/g39/Greg_Jennings/PPC/image002_zpsb310b0c9.jpg
PS: Thanks Sam! It is good to work with a PhD radiochemist.