the best factory round is the brand that shoots the " very best " groups from YOUR rifle. all manufactures / bullet brands / 40g 50g 55g on and on and on... will shoot different in your rifle. find the one that shoots itty bitty groups and go hunting and put it where it counts.
Ive been on the search for the answer to this question for some time. Ive found that the heavies, while still exiting, produce the least overall pelt damage.
However, if you aren't concerned about pelt damage, your options really open up.
Originally Posted By: 204 ARHornady 53 grain superformance seems to be pretty popular with a few killers I know. I'm not sure where you'll find much of anything right now though.