I'm a 30 caliber guy. I'd take a 300 anyday over a 7mm. To me a 7mm doesnt have much over a 270 or 280.
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Looking at the Federal Premium site and comparing loads for the .270, 7mm RM and .300WM using the Terminal Ascent bullets, the 7mm RM has a bigger advantage over the .270 than the .300WM does over the 7mm RM. At 500 yards, the max range for the charts, the 7mm RM has the most velocity, least wind drift and least drop of the three cartridges. When it comes to energy the .300 load has 140fpe more than the 7mm RM but the 7mm RM has 382fpe more than the .270.
Federal does not offer the Terminal Ascent in the .280 Rem, but I have loaded them for both my .280 and 7mm RM. Tne resulting velocities were 2898fps and 3085fps respectively. The 7mm RM leads by all ballistic measures. At 500 yards it leads by 157fps and 246fpe. If using equal velocity and energy as the measure, the 7mm RM adds 115 yards to the effective range of my .280 Rem. That is pretty significant in my book.
