Re: Modern bolt action 7.5 Swiss?
In a MODERN rifle, the 7.5x55mm Swiss can be loaded to slightly higher than .308Win and slightly below the 30-06. If kept to the original pressures, it approximates .308Win with lower pressures, due to greater case capacity.
Whether Winchester purposely copied the 7.5x55mm case for their .284Win or not, they are VERY similar in dimensions (so much so that .284Win brass can be easily reformed in workable 7.5x55 brass, with the rebated rim usually not causing any problems).