sticky sprue.

[troy_mclure]

im having a problem with a lyman 2 cav mould.

the lead sprue is sticking to the outer hole in the sprue plate, it takes some tapping to get the sprue knocked loose.

any tips to remedy this?

[stubshaft]

BULLPLATE

Check for burrs on it also.

[RobS]

It could be another Lyman issue. Some of their sprue plates are not drilled down far enough leaving a thick sprue flash for cutting and this can also make it hard to get the sprue to fall from the sprue plate. One can remedy this by using a drill bit or counter sink and working the sprue fill hole down until there is a thin cutting edge.

[troy_mclure]

BULLPLATE

Check for burrs on it also.

already tried bullplate

[Heavy lead]

It could be another Lyman issue. Some of their sprue plates are not drilled down far enough leaving a thick sprue flash for cutting and this can also make it hard to get the sprue to fall from the sprue plate. One can remedy this by using a drill bit or counter sink and working the sprue fill hole down until there is a thin cutting edge.

This is the problem, I had a newly aquired 454424 a couple of years ago, *** cast a 449 boolit and the sprue plate did the same thing.
It's in the scrap heap, the whole lot of it and is the last Lyman I will buy.

[Bret4207]

If the hole is too shallow a simple counter sink, cone shaped stone or even a good sharp drill bit will alleviate the issue. Rubbing the sprue depression with a carpenters pencil often helps and so does polishing/sharpening the bottom of the plate.

[kbstenberg]

Troy I'm in the same boat. I have an older Lyman I bought used. Know I know why the previous owner didn't use it much!

[sturf]

Try leveling the surfaces of the top of mould and bottom of sprue plate. I do this on every one i buy. None of them (Lee, Lyman etc.) come from the factory flat.

[casterofboolits]

Try leveling the surfaces of the top of mould and bottom of sprue plate. I do this on every one i buy. None of them (Lee, Lyman etc.) come from the factory flat.

+1. I stone the the sprue plate flat and remove sharp edges on all new mould sprue plates. I do the same for the tops of iron moulds. Lee moulds are at the top of the list for poor sprue plates.