Splicing???

[Smitty519]

I must be doing something very wrong, but I can't figure out what. I'm using a splicing wand and the instructions from Brion's video on double braid splicing. I'm having good luck with Samson XLS but no luck at all with Sta Set. 3 attempts in 3/8" new and one attempt in 5/16" slightly used have all failed with the same issue. The cover doesn't have enough slack to run all the way home. I end up with 1 - 2" that will not bury. It does not seem to be a problem with a sloppy crossover.

Can anyone help me pull my head out?? I'd really appreciate it!