Unless you are shooting pure Bullseye, any of the quality manufacturers should give you more than good enough accuracy. The trick is just to see what your guns likes.
But on that note, something we found with MG's is that the cover comes off while shooting - let me explain.
I shot LP 125 Stars forever. My source for those bullets quit carrying them (all before I knew about Star's situation). So I began asking around for a new bullet - everyone I asked was using MG's. During the discussions, we found that when people were shooting 115gr' in an open gun, they were getting a buildup in the comps similar to what you would find when shooting lead. They solved that problem by switching to 124gr. And these bullets were JHP.....so don't ask about lead exposed backs.
I have two open guns and one of the guns gets its C-More lens coated in this gold crap that I have to polish off after every match......and it is ONLY MG bullets that cause this problem.
One of the guys out here pop-riveted a piece of aluminum over his deteriorated blast shield.....come to find out, the reason his blast shield got eroded was because of the gold crap hitting it. Meaning after he put the new cover on, it became gold after its first match.
Does that happen in all guns? No. My backup gun (exact twin of my main gun) doesn't have that problem). My point here is that the MG's shoot great in my gun, but so does Zero, Star, and other quality bullets. Just find the cheapest/easiest obtained bullet that your gun likes......because whether the bullet shoots 2 inch groups or 2.5 inch groups isn't going to change your performance much in IPSC.