Pleeeeeeeeeeease tell me we haven't decided to use "CXPx" to describe the "platforms" of different game animals !!!
OK, I won't tell ya. But we are. Why?
I think I may have inadvertently stumbled upon a highly-entertaining new hobby: "Shawnee-Agitation".
berettashotgun:
Velocity edge very clearly goes to the bigger case, and all of this B.C. talk is kinda' pointless except for the competition shooters as far as these two rounds are compared. Check out some Nosler 25 caliber offerings - the newer stuff available has some sweet numbers; but I really NEED a B.C. over 0.500 to shoot a deer/hog/bear dead.
You make a good point. The reality here (for me and probably many others) is this:
--UNDER 250 yards, I'll take the 6.5x55 swede, for the bigger heavier bullet. Trajectory between the two is a complete wash (for all intents and purposes).
--Also, OVER 350 yards, I'll take the 6.5x55 swede. It will have more retained energy than the .25-06 due to the higher BC AND higher bullet weight - primarily the BC. This is mostly theoretical and probably doesn't matter in the real (hunting) world because the truth is that I personally would never EVER take a shot beyond 350 yards in a *hunting* scenario (large game). It's just flat out unethical except under the most extraordinary unusual conditions. If you did however, holdovers and wind drift would have to be known/estimated regardless of chambering. But BC begins to trump slightly-higher velocity past 350-400 yards.
-BUT, it's this "in-between" range (250-350) where the .25-06 will shine and be (slightly) superior in helping you make a hit. Any errors in estimating wind drift will be minimized by the velocity (velocity trumps BC as between these two rounds in the 250-350 yard range). Likewise the PBR/MPBR is longer with the .25-06 than the 6.5x55, if you're doing point n click, not estimating holdover. No it won't be 350, but it will exceed the 6.5x55 somewhere in this 250-350 range (with a target size of 8" - plus or minus 4"). Now since it's NOT unethical (in my book) to sometimes take a 250-300 or so yard shot, if conditions are right, then the case can be made that the .25-06 is slightly superior, espec. coupled with the bullet point #2 above, that the 6.5x55 excelling past 350 is irrelevant for most any hunting situation, since you/we ain't gonna do it.
I suppose this is one reason why I've hung onto my .25-06 even though I consider it a "mistake" to have purchased a rifle in this caliber. It's
arguably THE ultimate light-recoiling very-long-range pronghorn/mountain goat/mountain sheep rifle (and doubling as a dang good "light intervention rifle" to boot).
Also, separate from any ballistic factor, the .25-'06 Remington has now become of the THE quintessentially-popular chamberings for whatever reason, deserved or not. Go look at the new offerings in any turnbolt - the current offerings ALWAYS include this caliber for the American market, and even always include it when there are very limited numbers of chamberings being offered (new Marlin, Mossberg 4x4, etc.). The .25-'06, just in the last 5 years or so, has edged and pushed its way into a permanent niche as one of THE American big game calibers, *just almost* on a par with the "Big 3" of .30-30 win., .270 win, and .30-'06. It's roughly equivalent in popularity now, seems to me, with the super-popular 7mm Rem Mag, which are just behind the "Big 3". So the point is, ammo is cheaper and comes in more variety off the shelf than many many other chamberings, and MUCH more variety than 6.5x55.