McDermott suggests for any 3/8-10 cue be sent to them for proper fitting when ordering shafts. Wood joints are funny sometimes. Wood expands and contracts due to climate conditions etc... yes not all are exactly the same. Very common scenario, not just with McDermott but just about any great cue maker. 5-16/14 is in fact more consistent when matching up cues to shafts but often provides a harder hit than the wood to wood 3/8-10.
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