Good observation there Dean.
Back to the 2 3/4 shell in shorter chambers. I was looking at one of Jay Schacter's listings on GB. He made a statement that plastic hulled 2 3/4 can be used in shorter chambers and if you don't know why please ask. So I did. Here is his reply
There have been several well engineered studies of shooting 2 3/4"shells in AMERICAN MADE double shotguns with 2 1/2" or longer chambers. There is no meaningful increase in pressure when shooting plastic hulled 2 3/4" shells in the American doubles that are in good condition. These early American guns were designed when the shotgun shells were paper hulled shells that had much thicker walls than the newer plastic hulled shells. The forcing cones were approximately 5/8" of taper to the bore diameter. As the gun is fired, the crimp of the shell opens into the forcing cone, squeezing the shot charge into the bore diameter. The opened case did not extend beyond the forcing cone. The forcing cone dimensions were designed to accommodate the paper hulled wall thickness as it opened into the forcing cone. Plastic hulls we shoot today are much thinner walled than the paper hulls of yesteryear. As a 2 3/4" plastic hulled shell is fired in a 2 1/2" chamber, the crimp opens up into the forcing cone and allows the shot charge to be squeezed into the bore diameter. Because the 2 3/4" plastic shell, once fired, does not have enough length to actually open into the bore diameter, instead being contained within the forcing cone area, there is no added constriction as the shot charge is reduced to the bore diameter. Because the crimped end of the plastic hulled shell walls are significantly thinner than the paper hulled shell, there is no increase in pressure as the longer shell extends 1/4" farther into the 5/8" or longer forcing cone. This has been mentioned in McIntosh's book "A.H. Fox, 'The Finest Gun in the World" and articles in the magazines SHOOTING SPORTSMEN, and the DOUBLE GUN JOURNAL. Double Gun Journal, Volume 12, Issue 4, Winter 2001 has a lengthy article by Sherman Bell that is quite well done. Its summary after much testing concludes that there is no danger in shooting the 2 3/4" shell in a "healthy" double with 2 1/2" chambers. All that said, I have a wonderful double gun smith that can alter any chamber and forcing cone for $55 per barrel. It does reduce pressure slightly, and reduces recoil, wear and tear on the gun and shooter. I recommend this if the gun is not a highly valued collectible, is more of a shooter/game gun, and the gun will receive a fair volume of shooting, such as a sporting clays gun or a dove gun. Otherwise, for the shooting most Americans get at ducks, grouse, pheasants, quail, etc., the effect just may not be worth the expense. It surely is not necessary for safe shooting or to protect the gun. Hope that this is helpful,
Jay Shachter
Vintage Firearms, Inc.
Always buying nice American Doubles
LET ME SELL YOUR GUNS!!!!
616-292-6240
To be noted he stresses American Made, good condition guns and plastic hulled shotshells
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Hunt ethically. Eat heartily.
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