Well you haven't even given a calibre, neither have you said whether "14" is the year, press, die or qc number there is no such thing as "batch 14"
I've never had JSB .25cal that was anything other than single hole per mag through my Rapid, yet bar a sample from pelpax (with no batch details) all .20cal has been very poor in the MFR.
So if you want a meaningful answer, ask a meaningful question .