Hummer, your procedure is very detailed and works for you but I get good results with a much simpler approach. I have used the model B since 1972 when tumblers were tumblers, not vibrators. I have tried almost every conceivable combination that has been published and some that I made up. My procedure has evolved to something very simple. For ~200 pieces of brass, cover with water and add a couple ounces of Simple Green. Pins are not needed and add complications. Tumble for two hours and flush with water, then dry in oven at low heat for 30 minutes. Done. This works whether the brass has been fired one hour ago or one year ago. More simple Green or more time turns the brass a funkey green but that is cosmetic only.Thumlers Tumbler Mod B
brass and pins should fill no more than 60% of the volume of the drum, 50% even better.
Add 1 oz of Dawn if you like, I like Ivory better. If cases are real scuzzy, like they have been shot a dozen times and let sit up a long time go for 2oz of soap.
Add 1 9MM case or 40 S&W case of Lemishine
Fill with hot tap water almost to top of drum.
Tumble Three hours. Stop tumbler, feel water between fingers, if it doesn't feel slick your soap has broken down. Feel water for slipperyness before you start to tumble so you will know the feel. If it is not as slippery when you finish your soap wore out.
Remove cases from drum immediately! ! ! Otherwise the floating carbon will re=adhere to the cases inside and out.
Pour off black water and cases into 12 qt pan, remove cases from the black water mouth down so pins will fall out.
Place cases in second 12 qt dish pan of clean water with a 9MM case full of lemishine in it.
Pour out black water through fine mesh screen so you won't lose media.
Agitate clean cases and remove them mouth down again. You will probably see pins some out.
Lay out cases on black towel in summer time and let sun dry them or place them in swim suit netted back and place over heat outlet in winter.
After a match clean your bass asap as the longer the carbon sits up in them the harder they are to clean and the longer the tumble time. The faster you get the cases in the tumbler the shorter the tumble time.
Even better if you go to a match take a Lee hand tool and decapper. Punch your primers out and dump them in gallon jug with water and dish detergent and let them soak on the way home.
Keep a pair of needle nose pliers in case you get a pin stuck sideways in neck.
Place three drops of Mobil 1 synthetic motor oil in holes on each end of motor before each tumble. You should never have a motor go down lubed with Mobil 1 synthetic.
I generally size my case with no expander prior to tumbling and let the soap remove the case lube.
Before you buy new pins, throw the pins which have gotten stuck away and run the next batch of brass. I found that, after a couple of cycles that way, my problems with stuck pins virtually disappeared. I think the culprits were just a relatively few longer pins. I don't think the cutting process is that precise so there were some outliers.Could use some help here. I just tumbled using STM for the first time. Brass looks great, but 40% of the cases have a pin stuck in them. I assume I need to get smaller media? Who sells it? Thanks
but 40% of the cases have a pin stuck in them
If you can see in my original picture, the pins were stuck in the necks. ThanksWere they caught in the case neck or flash hole?
the pins were stuck in the necks
Happens to me on 6.5 Grendel cases.Didn't look at the picture close enough. I also have the STM system. I occasionally get a few pins stuck in the case necks only on 25 caliber. Doesn't happen on any other neck size.
Happens to me on 6.5 Grendel cases.
The pins I use have a nominal length of 0.255". With manufacturing variation and the position of the pin in the neck, I think those of us who use them in 6mm, 25 cal. and 6.5mm are going to have them stick periodically.That is a bullet diameter I don't load for right now. In the 25 cal necks they are at an angle, so in a larger case neck they look perpendicular to the opening. Looking at the picture, a lot catch.
My first attempt at wet tumbling. I checked the brass after 1hr and it looked terrible. It had a black flim on the brass that felt greasy. I wipe it off. It did not shine any of it. I used 1/4 teaspoon of lemi shine booster and a couple drops of dawn in hot water. The brass that came out of the corn cob looked better. Am I doing something wrong
My first attempt at wet tumbling. I checked the brass after 1hr and it looked terrible. It had a black flim on the brass that felt greasy. I wipe it off. It did not shine any of it. I used 1/4 teaspoon of lemi shine booster and a couple drops of dawn in hot water. The brass that came out of the corn cob looked better. Am I doing something wrong