I'm fixing to try to build a load for someone else on their Christensen Arms Classic 338 Lapua. The two bullets that they are interested in are the 270 gr Hornady ELD-X and the 250 gr Berger Elite Hunter. I have H4831sc, H1000 and Retumbo all on hand and would love to use one of those. I'd really like to use H4831sc if I can find good data for it, I've got about 11 lbs not being used for anything else. I can find data for H1000 and Retumbo but data on H4831sc is hard to find. Any help would be appreciated!