wind gypsy claimed: H1000 is just fairly slow burning to get a 300wsm which is most likely why you're not acquiring data. H4381, RL23, RL26, 7828 seem to be the sweet place for heavies but h4350 is a well-liked powder even now as well. Simply click to increase...Initially rifle vanguard accuguard 300 wby mag 24 inch barrel and is new to me so I am