The .270 Was Obsolete The Day It Was Created

I think you're looking at this in the light of modern powders and bullets with higher BCs. At the time of introduction, bullets were generally relatively blunt, even the spitzers, and the powders to get the level of performance out of the Brenneke with 170 grain bullets simply didn't exist. The powders to push a 130 grain .270 in excess of 3000 fps did exist. I'm sure Winchester looked at the 7mm bore diameter, probably based on a 30-06 simply necked down, and couldn't achieve the design goal of a modern flat shooting cartridge for western game, at least with no appreciable gain over the 30-06 cartridge. This was also the time of the .22 Savage Hi-power and .250-3000, and it was thought a lighter bullet at higher velocity would kill by shock alone, SD and BC be dammed. I think the .270 was a unique product of a unique time, and it became popular, so we were stuck with it for many years until 'Murica discovered the 6.5 and 7mm bores.

Winchester was also absolutely familiar with the 7mm bore diameter, having loaded .280 Ross ammunition during the Great War, and I'm sure they were familiar with the 280ish British experimental round intended for the P14 which they also produced during the Great war (in .303 and 30-06).

I am still trying to figure out what 7mm Brenneke could do for me that my 270 Winchester couldn't, given I have used my 270 to hunt everything from ground hogs to Elk and it has not failed me. There are lots of better and worst cartridges then the 270 Win but as long as you understand your chosen cartridge, play to it's strengths, understand its weaknesses, and shoot within your personal capabilities you will never be disappointed. I have hunted with far FAR less capable cartridges than either 270 Win or 7mm Brenneke and had both fun and success with them.

Cartridge wars are silly learning about a cartridge's strengths and weaknesses is useful.

We're done with this trolling thread was started just to pick a fight.