Same experience, have a young Blackhead male that I've aggressively paired with multiple girls this season, no locks. He's over 700gms, has great hemipenes but nothing all year. Other males have 10+ locks each this season. Also same challenge last several years with a Double Het Dreamsicle male ... nothing. Never know, mother nature can be very random. Good luck, keep pairing ...
Lol how do you "aggressively" pair snakes? I have a feeling I'm picturing something wayy different than what you meant over here
Chloe
0.1 Het Hypo- Indy
The cup is useful because of it's emptiness