Here is a picture of 2 sling bullets I made from dirt I dug up in the woods behind my house. The smaller one has some heavy blacksand added to it. I found out that brick is harder than my rockite and quikrete ammo. So I want some brick sling bullets. Brick is made from clay and sand that is baked. So armed with mr. Channing’s video on getting clay from dirt, I’ve got clay and I’ve got heavy blacksand, look out brick sling ammo mayb on the way?

Note that when you fire them, they will lose a significant amount of weight (and shrink a bit). If you fire them at a low temperature, they will be porous enough to dunk into water and gain some of the weight back. But they will also be weaker. I'm not sure if fully dense clay is more dense than concrete or not.

Here r the 2 dirt bullets that weighed in at 60grams, pictured above. This picture is after they had been baked in oven to 500 degrees. Results seem promising, no cracking and they only lost 10grams in weight. Still good weight to size ratio. Can’t wait to make more and fire them for real!

https://www.6mmbr.com/sandcomparison.html#:~:text=Sand%20Characteristics,165%2D1...

https://www.thecrucible.org/guides/ceramics/how-to-glaze/

Some links on the subject of sand density and firing technique for your perusal. I had the idea of making a typical biconical sling bullet out of dense clay and sand, fired then was dipped in a ceramic shell and fired again. Bisque is a term used for an object fired once already. I’d use a natural fiber string to dip and dry over and over then heat in the brick style kiln suggested in the second link.

Edit to fix link.

Here is my new rocketstove kiln firing several dirtclay sling bullets. We will c what I got in a couple of hours when the sun comes up. Here is a link to a short of the kiln
https://youtube.com/shorts/XONM9742zR4?feature=share

Yea, ive got some more experimenting to do. I didnt get the fire hot enough. The main reason for adding the black sand is the colonial brick making technique calls for sand to help stabilize and reduce the thermal roller coaster ride a rocketstove type kiln is going to send them on, they will need it. The whole idea is to turn the dirt clay into for real vitriflicphied brick with a pottery smooth surface. That hopefully will maintain the 75-80grams weight for a prolate spheroid that is 2.5-3inchs in length and 1-1.5inchs in diameter. These particular dimensions seems to have the best and most stable flight characteristics of the bigger than or smaller than sizes. I’ve not put together my video study of the different shapes and weights but it is on the way. If in doubt go check out Channing’s video where he made some of my sling bullets(80+grams) with a screws sticking out, like i was talking about in another post some time ago where i showed one with a different shaped concrete bullet and a nail. He was getting good sticks with them and they held up to the abuse quite well. So stay tune, you’ve heard the saying hard as a brick. That is what this is all about, free dirt to clay, free clay to brick, brick to sling at stuff….