Riley , great shooting and also you can use what ever powder is close on the burn rate chart but not too far off , and as far as turning the bullet around I've tried it and It doesnt make much differnce at short range say 100 yds. No problem with the 308 or 223 . Trailboss makes great subsonic loads for short range shooting ..
Remember the manual is just a guide but not an absolute solution . Sometimes you have to think outside the box to acheive your own results.