I am finally getting back into guns a bit (my youngest son has the bug, and I have to try to keep up with technology.) A few years back, I bought some Barnes X bullets (95 gr. 6mm), (165 gr. 30 cal) figuring they were the future and a good basis for a true all round load for our .243, .308 and 06. I know they don't shoot all that well out of the .243, haven't tried them out of the .30s. Now I see that the Barnes all coppers are running grooves to lessen pressure. Have the older Xs been a problem? Looking at the newer bullets, the Hornady SSTs look good and reviews seem excellent. Currently loading 100 gr. Sierras for the .243 and 150 Hornady spire points for the .30s. Any suggestions to maximize performance? I know by developing loads and chronographing that I can get right around 3000 fps. with 165s in the /06, so I think that should be my all round bullet weight for that, maybe 150s for the .308. Any ideas, suggestions are appreciated. Thanks.