30.06 and .270 cases. The same?

grumpa72 · April 12, 2011, 07:24 PM

I was sizing some 30.06 brass from my latest excursion with my m1
Garland and noticed two .270 cases in the pile. To my untrained eye they appeared identical except for the neck. So, being curious, I put a drop of oil inside the neck and tried to resize it. It looked just like my 30.06 case and all the measurements appear to be the same.

Other than an exercise in curiosity, are these case dimensionally the same and is this resized .270 case safe to reload and shoot in my Garand?

Thank you

wncchester · April 12, 2011, 07:52 PM

"To my untrained eye they appeared identical except for the neck. "

The .270 is a slightly longer .30-06 case necked down. Going the other way is common too.

GeauxTide · April 12, 2011, 08:32 PM

The 270 case is a little longer - 2.540 to the 2.494 of the 30-06.

Usertag · April 12, 2011, 08:39 PM

The .270 Winchester is a little bit longer than the .30-06. But everybody already said that.....So.

chris in va · April 12, 2011, 10:42 PM

I use them in my Garand. Resize as usual, trim to length.

FrankenMauser · April 13, 2011, 12:16 AM

As others have pointed out - the .270 Win is a longer case than .30-06.

This goes way back to the days when Winchester was working on their new "wonder" cartridge; and based the .270 on the .30-03, rather than the .30-06.

The .270s are fine to shoot, so long as you trim them to proper length.

grumpa72 · April 13, 2011, 06:26 AM

Thank you all. Trim it will be!

April 12, 2011, 07:24 PM	#1
grumpa72 Senior Member Join Date: April 5, 2009 Posts: 487	30.06 and .270 cases. The same? I was sizing some 30.06 brass from my latest excursion with my m1 Garland and noticed two .270 cases in the pile. To my untrained eye they appeared identical except for the neck. So, being curious, I put a drop of oil inside the neck and tried to resize it. It looked just like my 30.06 case and all the measurements appear to be the same. Other than an exercise in curiosity, are these case dimensionally the same and is this resized .270 case safe to reload and shoot in my Garand? Thank you

April 13, 2011, 12:16 AM	#6
FrankenMauser Senior Member Join Date: August 25, 2008 Location: In the valley above the plain Posts: 13,427	As others have pointed out - the .270 Win is a longer case than .30-06. This goes way back to the days when Winchester was working on their new "wonder" cartridge; and based the .270 on the .30-03, rather than the .30-06. The .270s are fine to shoot, so long as you trim them to proper length. __________________ Don't even try it. It's even worse than the internet would lead you to believe.

April 12, 2011, 07:52 PM	#2
wncchester Senior Member Join Date: December 1, 2002 Posts: 2,832	"To my untrained eye they appeared identical except for the neck. " The .270 is a slightly longer .30-06 case necked down. Going the other way is common too.

April 12, 2011, 08:32 PM	#3
GeauxTide Senior Member Join Date: April 20, 2009 Location: Helena, AL Posts: 4,426	The 270 case is a little longer - 2.540 to the 2.494 of the 30-06.

April 12, 2011, 08:39 PM	#4
Usertag Senior Member Join Date: January 1, 2011 Location: Louisville Posts: 261	The .270 Winchester is a little bit longer than the .30-06. But everybody already said that.....So.

April 12, 2011, 10:42 PM	#5
chris in va Senior Member Join Date: December 26, 2004 Location: Louisville KY Posts: 13,806	I use them in my Garand. Resize as usual, *trim to length.*

April 13, 2011, 06:26 AM	#7
grumpa72 Senior Member Join Date: April 5, 2009 Posts: 487	Thank you all. Trim it will be!