Chamber length Win. 21

[Kevin McCormack]

VERY timely thread! Yesterday I took my very early AH Fox AE grade 16 gauge chambered for 2 1/2" shells out for a round of sporting clays, using 2 different brands of 2 1/2" ammunition. The RST loads (1 oz. "Lite" in the purple cases with 'pie' crimp) measure exactly 2 1/8" unfired, while the PolyWad 'Spread-R' loads (7/8 oz. ) with rolled crimp measured exactly 2 1/2" unfired. As Researcher cites, both spent cases measured a full 2 3/4" when fired. Most interesting to me given the differential in actual measurements of the cases vs. the chamber labeling on the box, both at 2 1/2".

[jeffery c]

Originally Posted by Kevin McCormack

VERY timely thread! Yesterday I took my very early AH Fox AE grade 16 gauge chambered for 2 1/2" shells out for a round of sporting clays, using 2 different brands of 2 1/2" ammunition. The RST loads (1 oz. "Lite" in the purple cases with 'pie' crimp) measure exactly 2 1/8" unfired, while the PolyWad 'Spread-R' loads (7/8 oz. ) with rolled crimp measured exactly 2 1/2" unfired. As Researcher cites, both spent cases measured a full 2 3/4" when fired. Most interesting to me given the differential in actual measurements of the cases vs. the chamber labeling on the box, both at 2 1/2".

I found that modern black case Remington 2 3/4" shells only unfurl to about 2 9/16" Other brands pretty much go 2 3/4". I reluctantly shot that in my 2 1/2" 16 until I got onto RST.