I know there is a chart for powder burn rates,is there a chart for how hot primers are? The reason is I done some testing today with my 500JRH and got some interesting results.With a 400gr bullet over 10grs of 231 the accuracy was best with Fed 150s followed by CCI 300s then WLP then CCI 350s. Then a 400 gr bullet over 15grs of HS-6 it changed to CCI 300s,WLP, CCI 350s then Fed 150s. From a recoil stand point the fed 150s recoiled the least followed by the WLP a little more and CCIs the most of what was used. Accuracy differences weren't huge but noticeable,shots were rested @25yds. anyone ever noticed differences like this?

On another forum there was a recent question -do different primers make a difference ? Obviously they do as you found .Yes all components can make a difference .