I just got some 200gr 30 cal to run in the 30-378 the published BC for that bullet is .588 i think they are going to be a great hunting bullet so far they are showing very good accuracy right at 1/2 moa @100 with innitial testing this week but i have only tried 3 loads and am builing up. but 105.3 gr of retumbo is showing the best, running about 3478 fps avg. will let you know how they are running at distance when I get the info