Question for the statisticians:

I am doing load development for a few different cartridges with a couple different bullets and/or powders in same of the cartridges.

Where I could, I shot the test rounds on both the Magnetospeed and the Labradar.

What statistical test would one use to compare one data set to the other? Does one device tend to measure higher or lower than the other, or are the differences within the typical variation round to round?

It was surprising the number of times they registered the same velocity. There were frequent differences of a few/several fps, but I would have to go back and review the readings to see if one chronograph consistently measured higher or lower. I kind of think there is no clear favor to one chrono to the other. Several times there was a difference in the teens.