I too like 6.5s I have owned many 264 Winchester mag 6.5 Rem mag 6.5x284 260 Rem 6.5 Grendel and others I liked them all. The short comings in the 50 and 60,s was the Bullets the bullets today are much improved and ever year new ones are coming out. In the early 70,s I lived and hunted in Texas I shot and kill a lot whitetail deer with a 264 win mag it killed those little deer like lightning I thought I had the holy grail of rifles.Then I moved to Montana the deer in Montana are a lot bigger and harder to kill. I would shoot one it run off most I found some I nearer found no matter how much time I put in looking. I started looking for a better Bullet after three years trying the last straw I shot a nice bull elk at forty yards made a great shot but never recovered it. I looked for two days with no luck after that I had to go back to work that was the end. I had my rife re barreled to a 338 win mag end of problem I never lost another animal. Fast forward to now. There a lot of good Bullets I have killed many deer and antelope with various 6.5,s all one shot kills. The last two years I hunted with a 6.5 Grendel,the first year 100 gr Barnes ttsx this year I used 118 gr Cavity Back Bullets. Last year I got a buck and a doe both at a round 250 yds this I got a buck and a doe the buck a 300 yds the doe at 212 yds. All one shot kills. My advice pick out the 6.5 of your choice get good Bullets and have a great hunt.