My smith is finishing up my Badger 2013 with an Obermyer tight bore barrel in 260 this week and I have no idea where to start with loads. I've know the tight bore needs less powder but don't know how much less. I've heard as little as .5g to 4g, that's a big difference. I plan on starting with some 140g bullets, and I have some H4350 and H1000. Any starting recommendations would be appreciated.