here are some combos for those thinking about the 223 as an all around fun rifle for target shooting.
Speer 50gr TNT may just be the most affordable varmint/mid range bullet. Up to an 8 twist without issue and sub moa performance out to 600m (will get bounced around if going to 1000yds). mid burn ball powders like H335 to extruded like H4895 work. CCI 450 primer is rarely ever a bad choice.
There are a ton of varmint bullet options from 52 to 60'ish grs. Not really exciting to me as the ballistics/value math isn't as good as heavier or lighter choices. Now if you can find a sale on Hrn 55gr SPs and just want a plinking bullet to 600 and some laughs out to 1000yds, I would not disagree.
68gr to 75gr BTHP from hrn, sierra are a great place to be for availability, cost, decent ballistics and factory barrels. up to 8 twist without issue but will work in most factory twists except maybe the 12's and slower. Although best at mid range, these will get out to 1000yds
The 75gr Hrn ELDM in an 8 twist would be my choice as a 1 bullet close to far option cause this bullet seems to be available, well priced, mag friendly, chamber friendly, and QC seems to be decent. 1200yds is good fun... under calm conditions, it will go much further.
80 to 95gr need a 7 twist and can be great for those wanting a LR small case set up. I shot alot of Hrn 80gr Amax back in the day. Sierra and Berger make some fantastic options but bullet costs and loading fussiness may not be to everyones tastes. The rifle will also need to cater to the needs of the bullet and single feeding is typically used. My fave heavy is the 95gr Sierra MK which I toss out of a 22 Creedmoor
The most important tool if you want peak accuracy in a 223 case, quality milligram scale.
Jerry