You'll shoot more if you really enjoy shooting the gun in your hand.
A lot of gun owners have more than one pistol, some of them have dozens. Most of them would be better served by reducing their collection, and using the money to buy ammo for more practice.
I found that I became a better...
Bartlein, Hawk Hill, Krieger, and Broughton have been very good in my personal experience. I have a Wilson on a 223 and it shoots well, just not at the same level as the others.
For gunsmithing, I use Preece Precision as he is close enough that I can drop the gun off...
Bullet choice makes a bigger difference than powder choice in a 223. A quality bullet can go a long way toward small groups.
AA2230, TAC and H335 are good all purpose powders, especially if you are just dropping charges from a powder measure.
H4895 and 8208XBR are excellent extruded powders...
I had to remove one years ago to swap the handguard. A sharp drill in the drill press removed enough weld that turning over the barrel and giving it a smack on the backside of the pin, made it fall right out.
The key to an accurate load is a good bullet. The Hornady HAP and Precision Delta HP are accurate choices.
Ramshot Silhouette with a 124 HP from Precision Delta have shot well for me, but N320 and WSF have yielded good results as well.