Is there anything that can be done about rounded edges on cavity?

[happy7]

Probably be addressed before, but I can't find it. I have a new to me 452374 mold. It works great, drops bullets great, but has a major flaw. The cavity edges have been rounded in a couple places, causing a rather large part line. On the long tapered nose of this bullet, you can't size most of it off. Do I just have to live with it?

[Echo]

Sounds like a mold that has been mistreated prior to your involvement. >I< don't know of any way to cure it, but I'm a tyro. How do the boolits shoot? If they shoot OK, press on...

[Buckshot]

...................This is a used mould you have, right? Are you talking about things like this, below:

http://www.fototime.com/311071957D7E1E9/standard.jpghttp://www.fototime.com/37A4EF0735186F9/standard.jpg

The bottom parting line in both cavities have a definate rounded edge which also displays proud metal. Easily felt with a fingernail and very noticeable.

http://www.fototime.com/B83E3AB955DEAC4/standard.jpghttp://www.fototime.com/E2AF9FEC410B805/standard.jpg

ABOVE LEFTAlso plainly visible in this Lyman 12ga slug mould is the 2 worn corners. What is odd is that these are opposing corners and their mating corners are comparatively sharp.ABOVE RIGHT Opposite the worn corner in each block half is this worn parting edge. You can see it extends up into the sprue hole. No visible explaination for it other then wear.

http://www.fototime.com/018196BD77B45EE/standard.jpg

This block half had rounded cavity edges with expressed or proud metal, ditto around the alignment pin holes. This block half has had the pin holes countersunk and has been surfaced via 400 paper on a surface plate. If you notice in this photo the vent lines do NOT reach the edge of the cavity? This was where the ridge of raised metal was, as in the photo's of the pistol boolit mould at the top of this post. After surfacing the metal remains in the vent lines.

If you look closely you'll see there is no evidence of the use of a wire wheel in the various cavities, yet the raised metal and rounded edge in both these block sets is evident. I have no explaination as what causes this as simple wear wouldn't seem to push metal up off the edge into a ridge.

Amongst the number of moulds I see for hollow pointing, the above examples show up fairly often. Believe it or not, I've seen worse example then these. Indicating the cavities for HPing is interesting. Getting the opposing solid portions running to within a half a thousandth isn't much of a problem. However, across the 2 parting lines the ball end on the test indicater can drop as much as .006" as it passes over the seam.

As to happy7's question if anything can be done, from my point of view the answer is no. For some other application you might be able to mitigate it to some degree via peening but that would just create an even larger problem in a mould.

...................Buckshot

[Bret4207]

Buck, that bottom pic is a little fuzzy but it sure looks like someone wire wheeled it to me. I'm seeing scratches running diagonal to the vent lines.

[happy7]

Thanks for your answer buckshot. I guess I will shoot some and see how they shoot, but they don't look all that nice. Kind of dampens pride in workmanship.