In a word, abysmally. Both bullets have their issue(s), namely that they're yaw and therefore AOA dependent for reliable fragmentation. Gun X at distance X with ammo lot Y may reliably fragment, change any of those factors and reliability of fragmentation along with neck length(penetration tell fragmentation) can vary wildly. Google the fleet yaw problem if you want a more in depth look its a known issue and half the reason for 5.56's bad rap as a poodle shooter, if you're curious whether this is a realistic issue or not then feel free to start deep diving hunting forums in regards to both rounds and that'll answer itself(spoiler: yes). That being said the Mk262 SEEMS to be more likely to fragment than m193 during typical engagements based off anecdotal data, for instance after being adopted troop opinions of mk262 are almost universally and noticeably more positive than those same groups were about m193. As a basic matter of math a heavier fragmenting bullet tends to be more effective, more mass means more fragments, increased average weight of fragments, and a heavier remaining core(usually). All that adds up to bigger hole with deeper bigness in grug talk. Combine a bullet that SEEMS to fragment more reliably with a bullet that also does a moderately better job when it does fragment and you pretty much end up with a straight improvement for most folks serious use needs. <|endoftext|> 