For general sealing, I just dunk 2-3-4 and let them drip dry. For your issue, you need to allow that paraloid to soak in as deep as you can. I would immerse all the pieces and let them sit, submerged for a day at least. This will allow the solution to penetrate as deep as it can. After they have had a good soak, prop them up on a bucket lid and let them drain and dry. This way, what drains out you can return to your solution and you don't waste any of it. It will prevent any more loss of bits and give you a more stable surface for reconstruction. Is there any possibility that those antlers might have still had velvet on them? Cured antler should be relatively solid and not at all soft inside.
I doubt it, the 8 point was taken the opening day of regular season, I think it was November 17th. The 5 point was shot about a week later.
Thanks for the advice, I ordered some paraloid, should be here the 29th.