Quote:
Originally Posted by Dave Noreen
This has been my canned response for years on the chamber depth question.
...…….. Prior to WW-II many companies had the practice of holding the chamber about 1/8 inch shorter than the shell for which it was intended. .
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Just recently while prepping for an article I found an excerpt from a 1920 dated letter from W.A. King that stated, in effect, that Parker chambers were bored 1/8" short for the intended length shell, and furthermore that Parker had succeeded in getting even better distributed patterns with increasingly more than 1/8" overlap into the cone, to the point where the fronts of the fired [paper] shells were torn and ragged. The King letter also stated that latter practice was not recommended.
Readers please note that progressive burning powders weren't widely introduced for heavy shotgun loads until about 1922.
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