But generally speaking, with an identical load but in a longer shell that opens into the forcing cone, the pressure rise is a mere couple of hundred lbs. p.s.i. and is so negligible that neither the shooter nor the gun even feel it.
For years I shot 2 3/4” AA trap loads in my DH with Titanic barrels with 2 9/16” chambers. Every shell I extracted from the gun after firing had pinched and frayed mouths, indicating they had opened way into the cones. Increased felt recoil from these shells was quite negligible and not a cause for concern... even for my oil-soaked stock head which, to this day, shows no sign of damage due to heavy recoil.
However, it needs to be reiterated that a shooter NEEDS TO KNOW THE CONDITION OF HIS BARRELS, CHAMBERS AND WALL THICKNESSES.
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__________________
"I'm a Setter man.
Not because I think they're better than the other breeds,
but because I'm a romantic - stuck on tradition - and to me, a Setter just "belongs" in the grouse picture."
George King, "That's Ruff", 2010 - a timeless classic.
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