the depth of the land was much more important than the number when we did research back in the early 80 -90s for powder burners, however less land were better
octagonal barrels pissed over almost everything
Musgrave used 5 lands on the Musgrave RSA target rifle when everyone else were using 6 or more, and got banned from most international competitions as unfair advantage
twist rate in powder burner general rule is slower twist , heavier projie
thats also been the findings of Mat form airarmshunting when visiting FX they use a gradual twist from what i could gather for heavy slugs
