I believe small based on laying next to a # 410655 .40 cal mould. The spread on it is wider. Sorry I'm kind of a rookie on this. If there is a way you know to tell, please let me know. Joe
I would think that this takes the small handles, but check the end of the box and see if it is stated there. I have an old box that says large handles but it is a double cavity mold. steg49
Oops - you're right. However, the mold is pretty small. I've got the exact same one, but haven't cast any with it yet. Here are the dimensions: the narrowest dimension is 1/2" inside of one handle slot to the other. Overall width of the two halves together is 1.25"
I've always had the idea the small handles would work on this mold.