RE: What about burn rate of powders?
incase you didn't see my reply in the other post:
give Reloader 22 a try for the 165/168 gr pills. RL19 will work UP TO 150 faily well but you will probably get the same results with RL 22. You could try RL 25 for the 180's but 22 will work for this gr. If you try 200gr or better use 25 as it is on par with IMR1000.
Are you showing any pressure signs at 74.2 grs?