Wasn't it more common for there to be odd original lengths on earlier (hammer) guns? If I remember correctly, there was a some early processes or equipment that resulted in barrel ends getting damaged from time to time and they would clean them up, thus having them be shorter.
Either way, I do not think that Parker actually recorded the odd lengths, if manufacturing resulted in such. Maybe Mr. Bishop or Mr. Conrad could tell us more if odd lengths are listed.
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B. Dudley
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