6.5G vs .243win for Deer?

[buckbustn]

I just recently built a Grendel that I plan on using for hunting wt here in Oklahoma. I used to be in love with .243 because of velocity and BC. That was until I realized there were so many more rounds that outperformed .243. The other reason being about 10 yrs ago I decided to hunt with one. It was a nice rem (model eludes me). Any ways I'm sitting in my blind and out comes a nice 11pt. He quarters away and I fire. The buck never flinched. He did however flag me and run. Looked like an injured run so I waited a bit and then comensed to tracking. This was all done by track tracking due to no blood trail. About 300yds into tracking I find him grazing. I fire again at the same spot I thought my first shot was. He merely looks at me like I'm stupid, and continues to graze. I fire again and this time he runs again. Still no blood trail. After about another hr of tracking I find him dead against a blackjack. At this point I am utterly confused. As soon as I get him field dressed lo and behold there are 3 entry wounds just behind shoulder and 3 exits. Heart and lungs both had been shot but were completely intact. The buck died from internal hemoraging. He was not shot with fmjs either before anyone asks. All I ever shot out of it was soft points. I know people who use nothing but .243 for wt but from that year one I have forever sworn off .243 to hunt with.
Sorry for this being so long but I wanted to get my horror story out there for you.