I just got back from the range after firing my first batch of Lee 158 grain tumble lub SWC. I used between 5.0 and 5.2 grain of Unique and the oal was 1.80. I fired them out of my Smith 13-3 3 inch revolver. Best grouping I ever had at the range..2 1/2. The load was nice and light so I am going to up it to 5.5 and that should be just fine for me. Thanks for all the info before starting out....it really helped me out ....cheers.