Mea Culpa. At the range today, I fired both loads side-by-side. Even though last time they felt similar, this time around it wasn't even close. The BB load battered the first joint of my thumb whereas the Speer GD load was almost pleasant to shoot in comparison. I don't know how I managed to form the opinion they were similar recoil-wise because that was NOT the case today. I was shooting both loads in the same gun on both occasions. Though the first time I also included an airweight j-frame.
Chris