Funny......I'm also shooting in a bowling pin match this coming weekend, and will likely use my 6" 686. I even worked up a special batch of .38+P's with 150 Gr. LSWC's for the event. I wanted something hotter than a .38Spl, but not the recoil of .357 Magnum, and still have the energy to clear the pins from the table with one shot.
I've always used the HKS speedloaders, and I do alright with them, however I would like to get a couple of the Safariland Comp III's to see how much faster they are......