I wouldn’t say they are similar, what 6.5prc can spit out 200-215gr pills?
I don’t really think it matters. A 6.5 shooting extremely high-BC/SD 140-160gr bullets of similar construction at fairly similar velocities will do the same amount of damage on game as 200-215gr .30 cal bullets. There is no way in hell anyone could ever tell the difference between the same hit from one or the other.
Put either in a good spot .... the same spot, and...dead elk. Put either in the same bad spot, same outcome.
Which do you think you might be more apt to put in the right spot?
I’m 15 for 15 on one shot, no tracking kills on elk with 6.5s. Most of those were with a 6.5x.284 but a few with a .260 and Creedmoor. Fully 11 of those were DRT. The other three all fell in plain sight within 50 yards of where they were hit.
I’m 4 for 4 with the .280 Win and 2 for 3 with the 7-08, but the lone exception was an easy 100 yard tracking job. Went 1 for 1 with a 7mm Weatherby.
I’m also 100% DRT with the .270 Win and .270 Weatherby.
I am 60% with .30 cal, using .308 Win, .30-06 and .300 Wby.
I’m 33% with the .338 Win Mag.
Back to 100% with the .25-06 on elk.
If you ask me, a 6.5 non-magnum definitely makes a better elk rifle than a .338 Win Mag. Same goes vs .30 cal. I do speak from my own experience, which is valid and not anecdotal.
I’d do any 6.5 from the Lapua up to the PRC/GAP 4S before I’d ever consider a .300 WSM because I am certain the 6.5s kill elk extremely well and I’m even more certain I shoot them better than I can any .300 Mag.