Out to 300 yards, any bullet rated for deer will do...
I bought a Ruger M-77 in 1980 chambered in .243, it's the only centerfire I own...I've killed over 300 deer with this gun and around 200 fell to the 100gr CoreLokt...
About 15 years ago I wanted to try something different so a buddy and I tried almost every factory loading out there...When it was all said and done, I went back to CoreLokts...He went to the Hornady 100gr Customs and another buddy is using the Federal Premium 85gr HPBT Sierra GameKing...We all kill deer, life is good...
The only loading from that test that I quit using was the Remington Premier 100gr boat tail bullet...Thankfully they don't make that loading anymore...If I had never killed a deer with a .243 and that was the only loading I had tried, I would have gotten a larger bore...That bullet was too hard...Lung shot deer would run 100 yards or better...It was an extremely accurate loading and would drop deer on shoulder shots, but it didn't open up quick enough and left a small exit hole and less internal damage than others...
Of the rest of the bullets used, deer would fall between 20-60 yards with lung shots and all were hard enough for high shoulder shots...Some gave more consistant pass throughs but the ones that didn't exit would drop the deer quicker with lung shots...
As my rifle seems to love the CoreLokts I went back to them and never looked back...