I have tried a lot. The most success and accuracy between 3 different .243's that I have has been the Winchester super x 100gr. Good groups and good performance for the money. I have tried the xp3 and they perform even better but they are a little pricier.
Look no further than factory Federal Fusions. I shoot them in most of my rifles. They are bonded bullets without the bonded price. Better performance than standard cup and core bullets and plenty reliable for deer sized game. No need for the premium stuff for Pa whitetails but I would step up to the Fusions over the basic cheaper factory offerings.
Im a big believer in using premium bullets. Way to much time and other money spent to watch a deer run off. 95 grain silver ballist tips are all we use. Not hole punchers... but they create massive damage. Accurate from my savage and tikka.
I tried the new hornady reduced loads for my 7 year old. A bit less loud and a bit less kick. But they were all over place at 100. I let him shoot the 95 silvers and he handled the kick fine.
Never used Fusions in my 243, but killed quite a few deer with em in my 25-06 and 338 Federal and they do a great! When I use factory ammo in my 243 I usually use corelokts and never had a problem killing deer with em!
I tried the 95 grain Winchester whitetail xp's this year and was really impressed with the accuracy. I haven't done anything but punch paper so I can't speak to performance. I hope to be able to post about performance tomorrow.