IF it matters, the 7/8 oz. B&P case is a full 2 3/4"

B&P Competition One 7/8 oz. 2 3/4"; Fiocchi 2 11/16"; Fiocchi 2 3/4"; Federal (and Estate) 2 11/16"; Remington Gun Club 2 3/4"; Winchester 2 3/4"; Herter's (Federal) 2 11/16".



All 2 11/16" - Nobel Sport Low Recoil, Remington STS Premier, Remington Nitro, Federal Top Gun, Federal Top Gun



If the case mouth is feathered like the one on left, it probably does matter


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