Epic Epic Two velocity problem

Have you gone through David's video on how to tune the hammer spring correctly? I have an EPIC One 700mm and use his suggested technique all the time when I switch slugs and pellets. Once you hit the "sweet spot" then it is very consistant with a very low SD. The gun will exhibit what yours is doing if the hammer spring is too strong.


There are also some additional tuning videos on their website:

 
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I know the problem, your hammer adjuster is loose. There is a small grub screw on top just before your stock attachment, the center one. It controls the spring and bb that notches into your hammer adjuster. When you shoot, it starts backing out and loses tension on the hammer adjuster allowing it to spin with every successive shot. You need to snug it up, not too much as you don’t want to crush the spring, get your hammer adjusted where you want it, then back out the grub screw and add either vibra tite or blue loctite just a tiny bit and screw back in snug. That should keep things in place.