RE: Re Drill depthDeeper drilling requires a BQ core.The NQ core has a range of 0 - 610m and the BQ gives a further 300m.
What in the f*ck are you on about? Has nothing to do with ID/OD, son; has to do with the motor driving it, ok?
I've seen NQ taken down to 1600m and beyond.
Thanks for playing.