The Barnes Manual Number 3 lists the following for the 300 Winchester Mag with IMR 4350. The minimum load is 65.5 grains. The Max they list is 70.5 grains They show Velocity Max at 2993. This load would be for the non coated XFB and XBT. Be sure to start low and work up. You can enter Dupont powder loading data into your search engine and get some free load listing there as well. Never could find any free data from Barnes. This data is exactly as printed in the Number 3 Barnes manual.