Out of a rack of White tail deer antler i only get 5-10 useable ferrules......Throw out all the ones with Pith exposed on the sidewall.
1. I cut mine into round blanks immediently (1"X.15-18mm OD).........Let them sit for a month or so.....
2. Bore them to .312 let them sit for a couple days...
3. Install on .312 tenon and cut the ferrule oversized by a couple thousandths (say .030)....let the cue sit for a day...If pith starts to show cut it off and restart.....
*****as it cools it will shrink
4. Come back to the cue the next day and see if the Antler ferrule shrunk past the wood. If it did, start over.....
If it didnt shrink past the wood, cut it to size and polish lightly (NO HEAT) wait another day and see if it shrunk past the wood.....if it didnt, tip it and give it to customer......