I have read a couple of places on the web that each action/barrel combo has a certain harmonic produced by the shockwave travelling up and down the barrel which, when determined through trial and error, will result in the most repeatable groups. Most of these articles primarily are aimed at whether one type of fluting is better than another but the science behind them seems generally applicable.
For the most part I have figured out the max safe load for my rifle. Using the Hogden guide I have learned for the 175s, 168s, and 150s that their max loads are a good stopping point using my brass in my rifle.
My question is more: "Is it likely my action/barrel combo is limited to low velocity rounds due to the whip frequency or can I modify the seating depth/brass hardness/primer type to significantly change the frequency and therefore use a heavier charge to increase accuracy at longer range?"