It depends a lot on the weight bullets you are using. For 223 55gr I like Benchmark, 6.5 H4350, also used W760 which is easier to find a lot of times, 300WM H4350.
If you had to, W760, H414 can be used in both big rifles. Several times I have matched available powers to as many cartridges as possible to ease the pain when it’s hard to find. Get an big bottle, use that one for as many as possible