Tim,

I use beeswax/tallow mix lube in no particular proportions. I melt it in a tobacco tin and then dip the bullets (from the fridge)in using long nosed pliers. After they've cooled, I push then through the sizing die which just leaves the lube in the cannelures.

What about the powder you're using? I used to use the cheap medium stuff but noticed that my guns went woomph whereas everyone else' was making a bang/crack. Huge improvement when I switched to ts2 and again switching to Swiss.

Logically, it would seem that the bullets aren't getting the spin they need and skirt not engaging the rifling. It is a .577 presumably and not a .58?

Steve.