223 vs 5.56
If you reload, buy with a 5.56X45 chamber.
The inceased Throat distance will allow for a longer seated bullet, IF the magazine will allow for the increased length capability.
If you want to use the longer heavier projectiles, then consider a 1:8 or 1:9 twist. Most 223 rifles from factories have a 1:12 twist, some may have a 1:10. These are a bit slow for proper stabilization of heavier longer projectiles.
Have Fun - My wife enjoys her Howa 1500, and I like my 7 different AR's, my kids like their Ruger Number One's in Varmit model.
My favorite was a Rem 788 in 222Rem rechambered to 223Rem with a 1:14 twist. Using 40-45 grain bullets loaded Hot, it was a tackdriver literally. Still kicking myself in the butt for selling to a "friend" who won't sell it back.