300g barnes original ss is the best I've found, its a .458 bullet instead of the more common .452 bullets(sst/sw/xtp/most everything) They fit my bore with a black crush rib, but orange mmp's are another alternative. They are expensive, about a buck a piece, but they are absolutley worth it if your trying to push the envelope of what a ML can do. http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=635838&t=11082005

ps, they are a little hard to find, but worth it. Some guys have had good luck with the parker ballistic extremes, too.