It has already been said, but Varget.
I use Varget in 223 with 60gr VMAX, but H4895 in 223 with 55 NBT. I often read that Varget is best near max loads, but my 7-08 with only 37.5 gr of Varget is tackdriver with 160 Sierra bullet.
You will have to suck it up and buy 2-3 types bullets and powders, same as with factory ammo. I still have can and half of unused BLC-2 that I never found a good load with after 3 years.
120 Hornady SP, 150 NBT, 160 Sierra GameKing all shoot very well from my 7-08 Remington.
Oh, yeah, H4895 gives you the option of making youth loads down to 60% of start load too. This is a nice option.
Other advice would be to start with flatbase bullets. They seem to be less finicky, but you do have to chamfer the brass.