I hunt with a .243 but not an NEF. I do have an NEF in .22 Hornet though. It's a vicious little round. Took a small hog with it about a month ago, behind the shoulder shot and he dropped.
I,m glad you like the .243, it is one of the most accurate guns out of the box with factory ammo. little recoil with a big punch. after years and years of using mine my cofidence in it is extreme. I put the cross hairs where I want and squeeeeeeeeze. Boom !it's always right on the money. I have taken axis deer out to 300 yds with it. Longest witail shot was about 250, took a big 'ol boar at about 225 yds with a complete pass through. It's one awsome round, I love it.