Yes, use all the pins . . . if you're going to use them. On bottleneck cases, where you really don't need to clean the inside of them (leaving the burnt deposit on the inside helps lubricate your seating process and doesn't hurt anything). So, cleaning the outside without the pins works quite well . . . though then you may want to clean the primer pockets with something like a primer pocket uniformer tool. It doesn't take much Dawn, so just a little squirt and about 1/4 teaspoon of Lemi Shine into HOT water and the brass can be clean in ~1/2 hr. For light loads, it's still best to fill the tumbler to the normal level so you get the proper tumbling action on the brass and not have the case mouths get beat up.
+1 on the Brass Juice. Good stuff!!Fill it up, leaving just a bit of air at the top. Use all of the steel pins, or none at all, your choice. Steel pins really helps with nasty old brass, but really isn't necessary for brass in good shape like fresh from the range.
Direct from the Franklin Arsenal manual online:
The water here seemed to cause issues with LemiShine, I sometimes got pink brass even with just 1/4 teaspoon. So I stopped using it. Now I use Brass Juice and it's outstanding. Some people like shiny rifle stocks, I like shiny brass.
I stopped using pins.....brass juice is all I use these days.....awesome stuff.....
