How often should I be double-barreling at NL50?
a) Rarely, only against decent/TAGGY people
b) Maybe 20-25% of the time, you need a scary or overcard turn, and a read that villain is NOT a station.
c) Maybe 40-50% of the time, it's such a powerful play that you should be using it in a variety of contexts against most opponents, and only adjusting your frequency downwards when events specifically warrant it.
<font color="blue">I think its most effective being done like b, where you have a read villain is not a station and you have a good card to do it on. </font>
<font color="orange">This Q is impossible to answer. We need stack sizes, villan descriptions, board texture and game flow/image before thinking about this. I wrote something on this in micros a while back
here </font>
<font color="red">IMO if you are looking for a blanket statement, then "never double barrel at the micros unless its for value" is a good one. There are situations where it is appropriate but if you never do it you're not missing out on anything at all.