The reason they recommend different powders for the same grain weight bullets is because of bullet shape and hardness. What may produce the proper pressures to obturate the Hornady Interlock for quick gas seal may not produce a fast enough obturation with the Nosler Partition. It's very hard to mostly impossible to get a powder to do what that person was advising you to get. Way to many variables between those 3 cartridges to count on one all purpose powder. Ridge Runners suggestion for the 06's is fairly reasonable but I found H380 to be inconsistent in both mine and my dad's .22-250's. With a 50gr V-Max and Lapua brass, I found IMR-3031 to be amazingly fast and most accurate out of those 3 rifles. But like most things, it is more dependent on the rifle than anything. A load that may shoot 1/4" groups from my rifle may be 3" or more out of yours. Part of reloading is the vast choices it opens up. Limiting yourself to just one powder option is about the same as trying to run a race with your feet tied together. Powder isn't all that expensive to not run some tests.