for as long as Ive been alive and longer the 270 win with a 130-150 grain bullet has been considered by many hunters ,
to be about the ideal, low recoil, and longer range mule deer and antelope rifle cartridge.
but Id point out that,
what was considered long range in pre WWII was 350-500 yards,
as optic sights sucked, now with vastly improved rifle quality and optics,
1000 yard shot potential, in not uncommon.
the 270 win and recently the 6.5mm Creedmoor have both long histories of extended range hunting success on deer size game.
the recent popularity of the 6.5mm Creedmoor has started many people to consider swapping,
from a 270 win, with its higher initial velocity, to take advantage of, the faster twist and better ballistics of the 6.5mm bullets.
the advantage the 6.5mm Creedmoor has, with its sleeker low drag, bullets'
with a bit more aerodynamic shape with less drag, and heavier weight, is better retained velocity and less drop at long range, something shared with the 6.5mm Swedish cartridge.
but up until recently something the factory twist rate of the 270 win rifles did not allow you access too use of similar bullet designs,
(this has changed in a few limited options and is easy to correct on older rifles with a new barrel with a faster twist rate.)
the 270 win easily pushes a 150 grain bullet to 2900 fps
the 6.5 creedmoor lags several hundred fps behind with a similar weight projectile
example
if your really into long range hunting a falling block rifle like,
a ruger or browning, falling block,
with a 26" barrel might be an excellent investment,
as the extremely long bullets, seated to the ideal length in the cases,
may not feed in repeating action applications
https://www.speer.com/bullets/rifle_bullets/gold_dot_rifle_component_bullet/19-264140GDB.html
https://www.speer.com/bullets/rifle_bullets/boat-tail_rifle_bullet/19-1604.html
https://bergerbullets.com/product/270-caliber-170-grain-extreme-outer-limits-eol-elite-hunter/
https://bergerbullets.com/product/6-5-mm-156-grain-extreme-outer-limits-eol-elite-hunter/
consider that the main advantage the 6.5mm rifles have is that in most factory rifles the faster twist rates available,
in the 6.5mm Swedish the military's rifles originally had a 156 grain round nose projectile,
that provided deep penetration with little recoil,
this stabilized bullets to well past 1000 yards
and made the rifle's far more consistent,
than the 270 win rifles with its slower twist rate with similar bullet weights,
that won't fully stabilize bullets heavier than about 160 grains in the 270,at those extended ranges.
thus the 6.5 mm rifles have an accuracy advantage and retained energy at longer ranges,
but you can order a custom twist rate in a 270 win making it,
generally a bit superior in my opinion as its higher velocity.
https://kriegerbarrels.com/boltorder?se=kbical&cal=15
https://www.longrangehunting.com/articles/270-win-for-long-range-shooting.580/
https://www.handloadermagazine.com/270-winchester-0
https://www.snipershide.com/shooting/threads/fast-twist-270-winchester.6915932/
to be about the ideal, low recoil, and longer range mule deer and antelope rifle cartridge.
but Id point out that,
what was considered long range in pre WWII was 350-500 yards,
as optic sights sucked, now with vastly improved rifle quality and optics,
1000 yard shot potential, in not uncommon.
the 270 win and recently the 6.5mm Creedmoor have both long histories of extended range hunting success on deer size game.
the recent popularity of the 6.5mm Creedmoor has started many people to consider swapping,
from a 270 win, with its higher initial velocity, to take advantage of, the faster twist and better ballistics of the 6.5mm bullets.
the advantage the 6.5mm Creedmoor has, with its sleeker low drag, bullets'
with a bit more aerodynamic shape with less drag, and heavier weight, is better retained velocity and less drop at long range, something shared with the 6.5mm Swedish cartridge.
but up until recently something the factory twist rate of the 270 win rifles did not allow you access too use of similar bullet designs,
(this has changed in a few limited options and is easy to correct on older rifles with a new barrel with a faster twist rate.)
the 270 win easily pushes a 150 grain bullet to 2900 fps
the 6.5 creedmoor lags several hundred fps behind with a similar weight projectile
example
if your really into long range hunting a falling block rifle like,
a ruger or browning, falling block,
with a 26" barrel might be an excellent investment,
as the extremely long bullets, seated to the ideal length in the cases,
may not feed in repeating action applications
https://www.speer.com/bullets/rifle_bullets/gold_dot_rifle_component_bullet/19-264140GDB.html
https://www.speer.com/bullets/rifle_bullets/boat-tail_rifle_bullet/19-1604.html
https://bergerbullets.com/product/270-caliber-170-grain-extreme-outer-limits-eol-elite-hunter/
https://bergerbullets.com/product/6-5-mm-156-grain-extreme-outer-limits-eol-elite-hunter/
consider that the main advantage the 6.5mm rifles have is that in most factory rifles the faster twist rates available,
in the 6.5mm Swedish the military's rifles originally had a 156 grain round nose projectile,
that provided deep penetration with little recoil,
this stabilized bullets to well past 1000 yards
and made the rifle's far more consistent,
than the 270 win rifles with its slower twist rate with similar bullet weights,
that won't fully stabilize bullets heavier than about 160 grains in the 270,at those extended ranges.
thus the 6.5 mm rifles have an accuracy advantage and retained energy at longer ranges,
but you can order a custom twist rate in a 270 win making it,
generally a bit superior in my opinion as its higher velocity.
https://kriegerbarrels.com/boltorder?se=kbical&cal=15
https://www.longrangehunting.com/articles/270-win-for-long-range-shooting.580/
https://www.handloadermagazine.com/270-winchester-0
https://www.snipershide.com/shooting/threads/fast-twist-270-winchester.6915932/
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