It really depends on what you intend to hunt with your gun. If you are talking smaller varmints, just get some of the various 50-55 gr polymer tipped rounds or HP's. However, if you move up to larger stuff such as deer, I'd recommend one of the 60-64 gr SP's. For this type of hunting you want a round that has some ability to penetrate deeply (something the varmint bullets aren't good at) with controlled expansion. This produces an effective wound but doesn't totally shred and destroy the meat like fragmenting bullets.
The OTM match bullets are very accurate. The M193 and M855 are often accurate enough. And at closer ranges, all of the above types fragment well (if the target is thick enough). But once you get past 200 yards, none of the commercial OTM loads or the M193/M855 will likely fragment. This is why you would be better off with a good softpoint. But if you intend to hunt deer sized game or larger in excess of 200 yards, let me recommend a bigger caliber. A .223 is marginally suited to this role at close range. At 200+ yards, your chances of wounding the animal will probably be better than cleanly killing it. For this type of hunting stick to a .243 with 100 gr SP's or something larger. Afterall, we don't want to wound an animal and let it run away, only to die a slow, agonizing death. A heavier caliber would be a much better choice shooting at more distant targets.
-Charging Handle