I only have 2 moulds, both 2 cavity. I am going to purchase my next mould, this time for 9mm/38 Super probably 130 or 135 grain (leaning towards 130 at this time). I am very new to this and think that the more holes you have in the mould, the better technique you probably should have. I did pretty well with the Hardline Industries moulds in 40 and 45 (2 cavity). Should I try 4 cavity or stick with the 2 cavity? These things are not cheap and I don't want to make a $150 mistake.