i'm with you ringo those numbers seem high to me.
i guess if i didn't use a filter packet (so no loss to filter material) and i only squished trimmed top nugs of gg4 or something i might be closer to that range, but i'd rather smoke the top flowers and rosin the B nugs.
i get around 15% average return from using very nice trim in paper filter packets. after many pressings i extract what remains in the wafers by doing an ethanol wash. i use that for topicals and edibles, so it all works out in the end.
no matter how good your tech is, you can't squeeze a higher yield of oils and terps out of your nug than what it tests at. no one is pulling 27% return on blue dream or whatever am i right?
Well the guys who tell me this i feel to be fairly reputable, at least they have no reason to lie to me about it. The rosin thread on tokecity has a couple people saying 30% consistently, notably recently a report of a great strain to squish, here is the quote:
"I have a new favorite strain to squish, Brianberry cough. Had to look twice after squishing the first flower to make sure I didn't squish a ball of hash by accident. 33% return.
"
He also told me he gets 30% on a few strains, and not just on one bud:
"Also, I just tried a small scale experiment to see how quickly I could process an ounce into rosin. I started from jar, rolled all my snakes, used 1 flat iron and the c clamp and ended up with 7.5 40 minutes later. I could probably do it faster but I wasnt trying to rush. If someone did this with two people I could see this going way faster."
lastly:
" it was Jack's cleaner from tga. Tastes so much crazier as rosin than it did as BHO.
Cheesequake, qwerkle, and jillybean have all yielded similarly. Some do better fresher and some need to be a bit drier it seems. "