Range Day with Savage ML2

[overtheir]

Going to the range Sunday  and going to shoot the 50 cal I have    .458 Hordany in 300g and 325 g going to use reloader 7 with the orange sabot and tghe black crushed  was going to charge it 60g would I have to make the charge less for the 325 . Thanks 

[powderfinger]

how did it go?

[overtheir]

Not to well I thought I doubled charged the muzzle loader so when in dought I dump it out , have been back to the range time of season getting in the way hopefully this weekend .