years back...it was file it off straight as you can that was the normal way to do things.....I may or may not have been known to use angle grinder GENTLY to bring cases back down quickly...with lots of measureing going on,Im not a total heathen...
you arent taking off a HUGE amount and your deburring tool will clean up most errors without hassle,as long as you dont drastically shorten the necks,a wee bit too short is better than wee bit too long.
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