I did not mean to imply that the tweeking was for accuracy. Very few people can tell any difference on paper with .1 gr increments, even with a scoped rifle. The addition of tweeking would be exactly what you stated for,,, and that would be for velocity ( while watching for pressure) If you are throwing charges from a powder throw, then you wouldn't get to tweak much anyway. As you and most everyone here knows we have to work with weighed charges mostly if we are after that optimum load.
Many people use .5 increments or switch to .3 and let that be as low as they go. I almost hated to reply back to you since this is probably seed for high-jacking your thread. I hope that doesn't happen.
Actually I am very happy with the results you got so far with the bullets.