Mine is a Rem 700 that started life as a Light Varmint Stainless Fluted (LVSF). I did the trigger adjust myself and it is light and crisp. Didn't care for the soft tupperware stock because I'd get random barrel contact that would result in random shot placement so I replaced it with a very rigid Boyd's Laminate. Couldn't be happier unless I got it for free. I have a Redfield variable 3-10 wide field of view scope on it but the gun/cartridge is good enough to warrant a bit more magnification for varmints. No problems getting iddy biddy groups at 200 yards and have shot crows considerably farther.
I've tried lots of powder, bullet and primer combinations and what works best for me:
Light bullet load - 1.3cc Lee Dipper Cup of Reloader #7 with Nosler 40 grain Ballistic Tip bullets, CCI BR-4 primers (Fed 205 is a good substitute).
Heavy bullet load - 1.0cc Lee Dipper Cup of H-110 with Nosler 55 grain Ballistic Tip bullets, Rem 7 1/2 primer (CCI 400 is a good substitute).
Had disappointing results with 4227 and 1680. I use accuracy as the determining factor for what constitutes a good load. Mine may not be quite as fast as some of the others but very accurate in my gun.
I also got tooled up to make my own brass from 223 Rem. I like using the thicker military brass and turning the necks back to a consistent dimension. I'm sure that has a very positive influence on accuracy. Brass lasts darn near forever. The primer pocket is the first thing to go.
I recommended a buddy of mine try a CZ 527 American in 221 Fireball and he loves it, especially the Single Set Trigger. His has accounted for a large pile of groundhogs. I may pick up one of these myself if I find the right deal.
You will not be disappointed if you buy a gun chambered for 221 Fireball.
Should have taken this pic belly down. This guy has no head from the eyes up.