I agree with John's comments, except I don't know about marketing. Some people simply prefer the look of Bernard, or American Bunting, 3 blade Croille, etc over other composites. And Acme and Peerless are better finished than Vulcans. There are finish and appearance differences which fill preferences. But, again, no evidence is known that any Parker barrel is more rupture resistant than any other, particularly at SAAMI proof load pressures. So no, in answer to the common question, no evidence has been presented that Parker iron/steel composite barrels rupture at any less pressure than fluid steel.
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