New Member

[Hela52]

Welcome from Wyoming!

 

[Wanashoot]

Welcome from North Texas

 

[HRM Johnny]

Welcome from Virginia.

 

[mdmiller]

Welcome from Illinois!!
You will find what you need here!!

 

[Rflshootr]

Welcome from MD. Now let's talk about why you want to re-barrel from 270WSM to 300WSM.

Here is something to think about.
.277 140 grain Berger Classic Hunter

Input Parameters
Bullet Diameter	0.277 inches	Zero Range	100 yards
Bullet Weight	140 grains	Sight Height	1.50 in
Ballistic Coefficient	0.271	Muzzle Velocity	3000 fps
Temperature	40 F	Wind Speed	0.00 mph
Altitude	1000 feet	Wind Direction	9 o'clock
Inclination	0 degrees	Berger Bullets	Copyright 2013

Range Card
Range (y)	Velocity (fps)	Energy (ft-lbs)	Elevation (inches)	Windage (inches)	TOF (s)
100​	2825​	2482​	0.00​	0.00​	0.10​
150​	2740​	2333​	-0.85​	0.00​	0.16​
200​	2655​	2192​	-2.86​	0.00​	0.21​
250​	2572​	2057​	-6.10​	0.00​	0.27​
300​	2491​	1929​	-10.66​	0.00​	0.33​
350​	2411​	1807​	-16.61​	0.00​	0.39​
400​	2332​	1691​	-24.07​	0.00​	0.45​
450​	2255​	1581​	-33.12​	0.00​	0.52​
500​	2180​	1477​	-43.88​	0.00​	0.59​

That's no slouch. And you might even be able to get it up near 3100 FPS.
That should easily take you to 1/4 mile.