I have been trying to work up loads for a Weatherby Accumark .30-378 and not been doing very well. For one, the gun seems to be extremely sensitive to fouling (requires very frequent cleaning). Even with a clean barrel I have had a hard time getting any load to consistently shoot better than 2-3 inches @ 100 yards. I have tried bullet weights from 165 to 200 and a very large variety of powders. The couple factory loads I have tried shoot very well (inch or better) so there must be some way to get there but I have not yet found it. Any input from someone who has had some success loading for this round would be greatly appreciated.