Buying position with minraise preflop

[FlyingStart]

I play I sometimes make is that I raise from MP3 or CO, but just for 2*BB, with a marginal hand (I don't do it with alot of limpers, 1 max). This most often causes the Button or Button+CO to fold and the blinds to just call. After the flop the blinds usually checks and I pick up the pot with a 2/3 pot bet.

I haven't been through pokertracker with this move, so I'm not sure if I'm making money doing this.

Any thoughts?