I think the ONLY advantage of the 280 over the 270 is that it is a 7mm and so has an more easily sourced supply of heavyweight bullets in the 175 grain weight range.

If your selected bullets are going to be in the 140 to 150 grain weight range then because they are longer for the same weight I believe that your 270 will if both loaded to identical velocity outperform any 280 with the same bullet weight. And a flatter trajectory.

Especially so in respect of boat-tail or plastic tip bullets. We British used this fact to deadly effect with the 303 which incorporated a tip-filler to give this effect.

Thanks men. Stu

I have a custom 280 with a tight chamber. It is really nice to have the tight chamber as the brass doesn't expand as much. Mine is very accurate having an air gauge heavy barrel. I've found it deadly with anything from the barnes 120 gr X bullet to sierra 175 grainers. It also handles pressure very well, allowing loading that approaches the Rem 7mm mag. I think the 280 is a great cartridge, being more versatile than the 270. However, the 270 is awesome in its own right, being the ideal deer cartridge and adequate for most elk hunting. The bullet selection in 7mm excels. If I wanted an all around rifle, I would pick the 280 and handload.

If you are hell bent on rebarreling your 270, I support ar corey, et al and the 280. I have owned a couple Sakos in 280 and still have one in 7x64 (european 280). The 270 and 280 both perform like champs, but I prefer the 7mm because of the bullet selection and weight range is much better. Lou