SouthPaw
WKR
Even down at sea level, factory 6.5CM Hornady PH/Match ammo will get you 600ish yards for 1800fps minimum upset which is well past the OP's 500yd max. 6.5CM and 6.5PRC also have the same wind number. So really the 40% extra recoil gains the OP no practical advantage for 0-500 hunting, and makes for less fun practice sessions.What does that recoil get you? About 250 fps. That means less drop and more energy when the bullet gets there.
What sub-500 shot presentation would you take with the 6.5PRC that you wouldn't with the 6.5CM, assuming factory 143eldx/140eldm fired from both, and why?What if you get a shot at a big Elk bull and it is at a range that makes the 6.5CM marginal? What if the presentation is not idea?