After many years of shooting various 243's and 85 grain bullets using powders in the 4350-4831 burn rate, a friend suggested I try IMR4064 late last year. Although I've only tried a few loads using it, it has shown great promise especially in accuracy. Just wondering how may other guys are using this powder in a 243 and if you don't mind, what kind of loads you are using ? If any of you have "actually" chronagraphed any loads, it would also be nice to know what kind of actual velocities (not estimated book values) you are getting. BEN243