I'm on the verge of having a custom gun built for punching paper, varmits and the occassional whitetail (up to 500 yds), but I can't decide on the caliber. From what I've read, the 6.5 is superb. Yet I like the heavier bullet from the 7mm. I'd like to shoot the 6.5 with 147gr or the 7 with 162 A-max or 168 vld. What would you do and why? Thanks in advance.