In my experience using both types an RCBS 4x4 and Rockchucker, the latter has actually performed just as good or actually better due to the length of the cases.
The .308 isn't hard at all to load for IME, most loads are very tolerable to a small +/- tolerance. I usually clean and size up all my cases and store them until ready to load. Then I haul out my small portable loading set up to the range and work up a load. This is pretty easy using most of the powders which are so widely used. For my particular rifle, H-4985 has show to be one that it likes over several bullet weights from 125 up through 165grs, so I simply use it. There are others which might be better for longer barrels and better built rifles but for my Ruger Compact, I am looking for hunting load accuracy of less than 2" at 100yds which it easily accomplishes with this diet.
As mentioned weighing out the loads is easily done, and not overly time consuming when loading only a hundred or so rounds. If your loading in bulk pick a powder that is forgiving and throw the charges using a measure checking every 5th or 10 charge, and keep your hopper around half full until your through. The ball powders work excellent for this as do several of the short grain stick types, find the one your rifle likes and try it both ways. Don't just look for maximum loads and you will be way ahead in the game.
