Now that I have started reloading for my hunting rifle, I want to start thinking about my .223 for 600 yd competition. It's totally the wrong rifle (light/short barrel, 1:10 twist), but I want to try the sport before investing in a more appropriate setup. I've already picked the brass and primers, and I've narrowed bullet choice to three options at 69gr. Most of you are probably shooting heavier bullets, but 69 is the most I think will stabilize in my Tikka. Now the big question. What powder do you guys use? I need to narrow down my options to three, or I'll end up shooting out the barrel before I find a good load.