To give some idea of the potential advantage, compare the 300 Weatherby Magnum, 30/100 SMc, and 30-378 Weatherby Magnum. Usable capacity is identical for the former two; however, with best loads, the 30/100 SMc generates 10% more velocity than the 300 WM; moreover, it duplicates 30-378 WM performance, despite having 33% less usable capacity! The trouble is, no current mainstream action will handle such a fat case as the 30/100.
Sometimes, it seems as though it will be another 150 years before we are able to bring these superior designs to the shooting public but we are making headway, through its Custom
Shop, Savage is now offering the 5mm/35 SMc. This is a 20-caliber varminting number that does just about anything that the 220 Swift will do and does so without heating the barrel any more than does the 223 Rem! With time, we expect to see more of these optimized chamberings offered. SMc Designs up to 6.5mm and possibly 7mm will work through existing actions, for 30-caliber a larger action is required.
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Representations
of Cases with Similar Volume