Hillbilly,
one more (probably unnecessary) comment: The 6.5mm cal. has bullets both lighter and heavier than does the .270. The real value of the heavier ones is the tremendous SD for penetration on heavier game. Yes, this really is a grizzly-capable round for the expert rifleman, though I'd never shoot one with a 6.5 myself :-) I've never taken a boar with one, but I'll bet that 160gr RN will drop a hog like a .444 Marlin load.
And Steelhead, There are a half-dozen 6.5s in the family and we've had more of 'em in the past. They *all* seem to work as yours does; very tolerant of load, bullet, etc, but each rifle/bullet has its sweet spot where group size falls to a minimum. That sweet spot seems wider (changes in powder weight) than with most mid-caliber rounds, though.
All-in-all, 6.5 seems to be *the* ideal all-round caliber for the NA shooter. I'm getting ready to comvert my Swede to 6.5-284 Win., not because I need more ballistic performance (the original chambering is an excellent 350 yd antelope round with 120-130gr poly-tip bullets), but in order to get a tight chamber (esp. the neck, and a new throat for greater accuracy. There just isn't enough meat in the bbl flange to set the bbl. back far enough to rechamber in 6.5X55, or I'd do *that*.
Cheers/buffler
who likes 6.5mm cal., esp. the old Swede, just uncommonly well