Preparing new brass mold for casting

[8shot]

I know this has been discussed before but I can't locate the posts related to preping a new mold for casting.

Have a new MP 4 cavity brass hollow point mold and would appreciate the proper prep sequence before casting bullets.

Thanks

[Randy Bohannon]

Degrease with alcohol or some other polar solvent some people use carburetor cleaner. Heat the mould up and start casting, when done I use a piece of paraffin wax on the sprue cutter to prevent rusting. The wax will burn off when you heat the mould up again, causes no issues.

[8shot]

Degrease with alcohol or some other polar solvent some people use carburetor cleaner. Heat the mould up and start casting, when done I use a piece of paraffin wax on the sprue cutter to prevent rusting. The wax will burn off when you heat the mould up again, causes no issues.

Thanks..I thought there was a "smoke" procedure..maybe just for aluminum molds?

[Wheelguns 1961]

I have several mp brass molds. Here is my procedure. First thing is to insert the pins that you will be using. Once the mold is put together, I clean everything with dawn and hot water. Next I heat cycle the mold three or four times. To do this, I put the mold in my toaster oven on 400 degrees for about a half hour. I then remove it and let it cool to the touch. Repeat. Before the last heat cycle, I scrub it again. This usually lets me produce good bullets in a very short time.

[Gamsek]

https://www.mp-molds.com/tipstricks/...-point-moulds/

[8shot]

https://www.mp-molds.com/tipstricks/...-point-moulds/

Thanks..thought I saw the instructions somewhere.

[JonB_in_Glencoe]

I have several mp brass molds. Here is my procedure. First thing is to insert the pins that you will be using. Once the mold is put together, I clean everything with dawn and hot water. Next I heat cycle the mold three or four times. To do this, I put the mold in my toaster oven on 400 degrees for about a half hour. I then remove it and let it cool to the touch. Repeat. Before the last heat cycle, I scrub it again. This usually lets me produce good bullets in a very short time.

I do the same as Wheelguns explains.
What this does, it start the patina process (oxidation). The patina layer helps the mold release the boolits and inhibits tinning.
.
Another thing I would do with a new HP mold, is to polish the HP pins before the heat cycles.