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On the alternative hand, the .Three hundred Winchester Magnum has a barely longer case length (2.Sixty two″ vs 2.5″) as well as a shoulder that sits .156″ in addition forward than the shoulder of the 7mm Rem Mag. Though they each have the equal rim diameter and are very comparable in standard duration, the longer case length and gain of the shoulder placement on the .Three hundred Win Mag offers that cartridge a five-eight% gain in ability over the 7mm Rem Mag.
Note: even as the case ability figures listed under do deliver a good indication of the variations between the two cartridges, specific case capacities vary barely in step with the logo of brass used.