I shoot .458 300 grain NP and just purchased some BH 209 to try. I also use the MMP OrangeSabots and Winchester 209 primers or either CCI 209 primers. I got great accuracy from the T7 2f in 100 grains previously, but all the talk of BH 209 makes me want to give it a shot. Has anyone tried this load with BH 209 and got any suggestions on what charge I should try?

Oh yeah, T/C Encore 26" barrel.
Thanks in advance!