I started with a .243 Encore years ago. Did OK on groundhogs with 70 gr. BTs. Was OK on deer, but I'm always looking for a little more power. SSK rechambered it to 6mm AI. Now it's my "super" long range medium cal. groundhog and deer gun. Have done several deer at 400 yds. with 85 gr. PTs, groundhogs to 450 with 70 gr. BTs, and one monster javelina (55#) at 177 with the PT.
It was good when it was a .243. Now it's great.