I've loaded for 4 or 5 different cartridges for the last 10 years or so. Most I've been able to get to shoot reasonably well with out too much work. This .308 I'm working with seems to either really like a load or not at all. I kinda figured a .308 would be less finiky then some of the more overbore rifles I've had(.25-06 AI, 7 mag ect.) (loading for my .223 is a breeze) but groups seem to go from 2" or 1.5" down to 3/4 moa with a 1/2 gr. powder difference? Do you consider this normal? Seems like my .223 will either shoot a bullet or it won't (working with the load produces better accuracy, but none go from 2" to 1/2" that quick) part of me says "heck, be happy-you got it to shoot!" but the other part of me wonders why it is so dramatic? Your thoughts?