As long as your aware there are pro's and cons's to BH also, the choice is yours.nothing wrong with 777 and you can obtain the accuracy your looking for with the right sabot,bullet and powder charge.do a search here on this forum for what works in your particular rifle and it will help you find that magic combo!i can't afford Bh 209, would i try it if i could ? you bet.would it be the powder i used all the time.don't know possibly.IMHO loose powder is the way to go regardless of what powder you choose.