I have played with brass and boro. (mostly rod) Would not be my choice, but here is what I learned:
Casings are thin wall brass. Melting point is 1650F. Need really good ventilation. Brass fume is dangerous. Turns black after a small amount of time in the flame. You must clean brass off with a brass cleaner after it comes out of the kiln.
Could be trace amounts of lead where the bullet was seated,I would clean them inside and out with a good brass cleaner before starting, and the primer would need to be knocked out before starting( the part the firing pin strikes).
Might work if you could keep piece in the tail of the flame, but boro take a lot of heat to shape......don't let the brass get over a slight glow.
Who knows, might be the next great technique!!!
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Working with a Red Rocket,Red Max,Natty hand torch-- and tanked oxy from a Homefill system
Bryan M
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