Great Job, daryl and Afro!
A quick question,
I just made a MkII version of the mould for the .404. Pics will be up soon, I burnt my hand smelting about 30kg of WW and used airgun slugs -Guess who's a happy camper?
The .425 bullets were dropping at 380gr,@.425" just what I had planned.
I'll have to tweak the .286" a bit to get the weight down from 190 gr to 145

What I found was, the moulds were a bit overengineered, with an 8mm MS 'round' handle and a 3mm sprue plate
I was losing heat and had to keep the mould constantly heated { material is 4140, I told you, over engineered

} how do you find the C clamp and other accoutrements affecting the heat sinking?

Gungadoug-Saw this post late, apologies , is it the general design you're lookig for , or a specific caliber? I'll dig out the drawings .
Cheers