What my Chrony told me:
What my Chrony told me was pretty much what my reloading manual told me: that rifles were individuals, and different loads would perform differently (velocity, pressure, POI, all of it) in different rifles. The same make and model of gun, same caliber and twist rate, produced only 6 years a apart, in the same shop (by the same people, in all likelyhood- 1950's production) had distincly different results with the same bullet and powder. There are so many variables in internal ballistics ..... this is why we start at the START LOADS, and work up ..... and restart anytime one component is changed.
One load might work as advertised and others might not ..... you won't know till you try.
TheGolden Rule of Tool Use: "If you don't know what you are doing, DON'T."