To the OP, that straw trick works great, and the brass insert mentioned works even better. I use the brass one personally, but when using Big Game powder, if I"m loading 47g lets say, I program the throw for 46.5g and more often than not it will land on 47g anyway because it meters so freely, as you say. If it's a little short, a quick trickle fixes that. Works good for me anyway.
