As he often does, BD makes a valid point. And comes very close to the crux of the issue: Equating cartridge length with "power" and potential over-stress of the barrels.
Neither is necessarily the case.
A 2 1/2 inch cartridge can be just as effective as a 2 3/4 inch. In fact, the extra 1/4 or so is simply there to accommodate the crimp fold. BD's photo shows this.
And, as has been flogged out many times on this board, Sherman Bell has long since proven through scientific tests that this extra 1/4 inch of case has virtually no effect on chamber pressure.
Thus, lengthening a Parker chamber is virtually pointless. And might even be dangerous.
(But Bachelder would NOT do "dangerous")
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