OK here's the flat out straight answer........bluntly! YES! (Regardless of what wildrose says.
Wildrose has the identical relationship with the 270 as I do for the 243 Win. What a wast of natural resources!
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160 class bullets out of a 270 Win are simply too long and heavy, thus too slow allowing more time for environmental conditions, wind, to work. Shooting rainbows was never too popular in my list of fun things to do.
If bigngreen is shooting those bullets spot on with a bc of 0.650 which is a very good bc but not outstanding for Win velocities there may be other options out there.
Read bng's elk write up with the 165 Matrix at 856. Note the energy and velocity mentioned. you won't approach those numbers with the Win cartridge. However, your after deer vs elk. Scale down his hunt to a nice muley and the 165 Matrix, and the distance @ who knows, say 700 or so and you have the same scenario, maybe even better as deer are DRT easier than do elk.
Most elk shot with the 277 cal are done in with 150 class bullets at closer ranges. The best mass produced bullets in this class have a bc of 0.496 advertised. Get yourself a 150 class bullet pushed at 3000 FPS MV with a bc of a bit over 0.600 and I think you have a combination out of the 270 Win that will get you where you want to go.
I shoot a 270 Win rebarreled with a 27" Lilja shooting 140s @ 3200 with clunky .496 bc bullets and she's a dream. I stopped stretching her @ 650 yds (1/2 MOA) when I had my old Rem 721 built into a 270 Allen Magnum. Will be trying the Winnie with the higher bc 140s and 150s next year. We'll see!
Another QUALITY thought. Rich Sherman (elkaholic) sent me a 6.5 Sherman case, based on the 270 Win case. Sexier than Marlyn Monroe in a potato sack!!!! Bigngreen knows all about that case.
If you're gonna rebarrel, I'd seriously (if it were me I'd definitely do it) consider a 270 Sherman. Even if I had to buy the reamer (and I'm a cheap sucker)
The 27 inch barrel is good as it is on a carry gun that will reach out and touch. A barrel much longer than that bumps into too many trees and things.
For a dedicated 1k rifle 30" including brake would be my choice in a winnie cartridge.
Said more succinctly: Hell ya, go for it.