What I have been doing since this primer shortage is taking my time reloading and studying all the tips that I can.

1 use the same mfg. brass
2. weigh each bullet and use all the same weight
3. use a powder trickler for exact loads.
4 prep brass exactly the same
5. consistent seating, crimping

every little thing you can do helps a little but they all add up.

I just started loading and experimenting with .223 loads and have learned alot about centerfire loading. My most accurate load to date I found is 20gr of 4198 with 52gr barnes with a 20" - 1:9 twist, it just not strong enough to cycle in my AR but 3 touching holes on some groups at 100yd , I got there the usual way by experimenting and being consistent.
The primer shortage has slowed down my centerfire shooting but has help me tune my rounds.