.223 .308 Powder

[OPC X6]

I would like to start reloading for m .223 AND .308.
Is there a powder that will work in both calibers or will I be compramising one for the other.
I plan on using 75g A-max for the .223 since I will be shooting to 800yds.
and 168g A-max or jacketed bt for the .308.

Your suggestions are greatly appreciated.

My favourite load for .223 in a Ar-15 Match rifle used H4895. It would shoot under 1/2" with 36X target scope for load testing (SGW upper and 24" bbl).
H4895 is also good in .308.
My choice for .308 was IMR4350, case full, you cannot overload, excellent accuracy, low pressures.
OPC X6