I'm getting my gun back from the smiths this week and want to begin load development. I'm going to be running a Bartlein 8.5 twist 5R 30" barrel. I have some 140 AMAX and also Berger 140 VLD's which is what I'm hoping to make work. I am also going to get some Lapua 140 Scenars depending on how the Bergers work. I will mainly be shooting this at 600 and 1000yds. I know IMR4350 or H4350 is what most guys start at but I'm thinking I will need to go with a slower powder with the long tube, but I also see these powders working with 28" barrels. Just wondering if anybody else is reloading for this length.