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View Full Version : Resizing 270 WSM brass to 300 WSM?



rci2950
05-31-2019, 05:12 PM
I have about 45 270 WSM brass that I would like to use in my 300 WSM rifle (Browning A-Bolt). I resized one of the 270 to 300 and the dimensions look the same off hand. what's the general consensus?

Gunreference1
05-31-2019, 08:01 PM
Here are the dimensional differences:

.270 WSM - https://loaddata.com/Cartridge/270-Winchester-Short-Magnum-270-WSM-using-Sierra-bullets/8130

,300 WSM - https://loaddata.com/Cartridge/300-Winchester-Short-Magnum-300-WSM-Using-110-GR-Hornady-Bullets/7451

Pay attention at the dimensions around the shoulder.


Steve

rci2950
06-01-2019, 07:34 AM
Measuring the resized 270 round it looks like the expansion of the neck causes the shoulder to be the correct dimension