text:  The .270 was pretty awesome at the time. First of all, it was, I think, the first .27 caliber popular rifle cartridge. There was a lot of wondering of why would we do that? We have submillimeters. We have .30 calibers. Why .270? I don't know the answer to the why. I just know that it works. Basically, you take a .30-06 and neck it down to .27 caliber.