Hi John
As I have said before caliber discussions are largely academic, although you seem to have a balanced view of the caliber others seem to believe that the Swede defeats the laws of physics.
As far as liking or not liking a particular caliber I think of them like women, I can usually find something to like in them all.
Any way it is not easy coming on here and trying to explain that it does not possess some kind of magic. 
Daniel if you are going to be pedantic this will take a long time, I said “approximately the same.” The facts are:-
156gn 6.5 bullet SD .320
160gn 270 bullet SD .298
175gn 7mm bullet SD .310
220gn 30 bullet SD .331
The 6.5 has about 7% better SD than the worse bullet listed, the 270, however using your quoted 2400fps for your 6.5 in comparison to a full house 270 reload you are looking at a muzzle energy of 1994 ft/lbs, against 2885 ft/lbs for the 270, now which ever way you cut it that is a massive difference. 
If you need to shoot 200 rounds of practice rounds there is nothing to stop you down loading the other calibers for this and run your full house reloads for hunting, then you would have the best of both worlds. You never feel recoil when shooting game any way.
No you are wrong; the 220gn drops less than the 156gn bullet when both loaded equally.
156gn bullet at 2400fps drops 6.4” at 200 yards
220gn bullet at 2500fps drops 5.6 at 200 yards
Although when shooting running game especially the size of moose it is got to be completely academic which drops the less.
While the 30-06 will recoil more than the 6.5 it is producing more energy. Newton’s law states:- “that for each force there is an equal and opposite one.”
The more powerful the cartridges the more recoil even the Swede can not defy physics.
It recoils less because it is not as powerful; in the UK we don’t in general have to worry too much about recoil as even magnums are pussy cats to shoot with a moderator fitted.
ATB
Tahr
sorry again you are comparing apples and oranges.
factory loaded 220 grain in 3006 generates 2410 fps and not 2500 fps
and 156 gr factory loaded 6,5x55 generates 780 ms=2560 fps(norma) and 2630 fps by Sako
and what makes less drop is BC of bullet(shape) which means a 220 grain pointed like 220 gr sierra spbt maybe even at 2400 fps may drop less then a round nose 156 gr in 6,5x55 even at 2560 fps factory loaded,
in reality there are no company loading 3006 with pointed 220 gr hunting bullet and not higher than 2410 fps, and not loading with pointed bullets too because 1/10 twist rate of 3006 rifles can't stabilise such a long bullet!!
but in reality 6,5x55 rifles with their 1/8 inch twist rate can stabilise 156 gr and 160 grain very well.
140 grain 6,5 has 0.287 sd
and 150 grain in 270 has 0.279 and
if you compare 6,5x55 with 140 grain loaded to 2800 fps + is very near to 270 win and 150 grain loading at 2900 fps and in this case 6,5 have better sd than 270 for better penetration!!
here some facts about 6,5x55
Norma 6,5x55 factory loaded with140 grain nosler @2700 fps is a potent round generate 2250 fpe energy and is enough potent for nearly all kind of deers in europe.
RWS 140 gr DK generates 870 ms/2854 fps which is not far behind 270 in velocity and with better SD too.
RWS 6,5 x 55 DK 9,1G
Code N° 2116995
BALLISTIC DATA
RWS
V[m/s]: 870= 2854 fps 820 771 724 679 635 593
E[J]: 3444 3059 2705 2385 2098 1835 1600
50m 100m 150m 200m 250m 300m
100 m -0.7 0 -3.5 -11.6 -25.1 -44.7
MRD 175 m 1.3 4 2.6 -3.6 -15 -32.6
i have tested this load from my husqvarna rifle with 60 cm barrel it generates 852-857 meter per second around 2800 fps!
their 127 gr kone point has 2900 fps at muzzle according to RWS.
6,5x55 is a potent load in modern factory loads and not far behind 270 win and difference is very marginal and more on the paper than in the field!
here sako ammos table
6.5x55 SE 119E RACEHEAD 9.0 139 gr■ LR N160 2.75 / 42,4 850 803 758 714 3251 2903 2587 2296 0.7 2.2 0 -6.2 -16.7 -31.7 175 20 500
6.5x55 SE 120E GAMEHEAD 10,1 156 gr ■ - LR N160 2.70 / 41,7 800 720 644 574 3232 2616 2096 1662 1.4 3.1 0 -8.4 -22.7 -43.6 159 20 500
850 ms is 2788 fps for 139 grain and 800 ms is 2630 fps for the 156 grain loads!
all these loads can be improved by hand loading too, because factory loads are loaded att low pressure !! due to a large amounts of old miltary rifles around here!
6,5x55 with 156 gr bullet do not have 2400 fps at muzzle velocity unlike 220 gr in 3006 and with 156 gr it has 2560 fps and has killed and kills loads of moose which are much larger deers than red deer every year .
the only games that 6,5x55 could be marginal is bear or big boars which 3006-308 are in lowest scale and 9,3x62 is better choice and even 270 could be marginal too.!
after all shot placement and bullet's quality and weight is much more important than a few fp energy more at muzzle!
your ballistic infos about 6,5x55 are not correct, please take a look in some ammo maker's sites !
regards
daniel
it is an adequate deer calibre that works best with lighter bullets weights in comparison with other main stream cartridges. In terms of muzzle energy produced it is a bit more powerful than a 243 and behind just about every other major deer calibre used in this country. 
.
even @ 2300-2400 fps which is much less than factory loaded 6,5x55 with 156 gr is around (2600 fps) still the 6,5x55 has much less recoil than a 3006 with 220 gr@2300fps! 
