If it ain't broke don't fix it.
45 gr of Varget and a 168Amax/ELDx is super accurate.
If you want to dabble, aa2460 is easily found and inexpensive and 49 grains pushes a 130 Barnes TTSX (easily found as well) at 3130 FPS from my 18" 308 bolt gun. Super accurate also and good to 500-550 for hunting.