The only thing that really should matter is the locking around the slide (sliding blocks?) It doesn't matter how much clamping pressure you put on the mold, if the heel flexes, it's useless. I usually like to have 3+ inches thick heel behind the slide to prevent that...(that is along with the locking angles on each side and a strait wall in front.)
Lot of times Mold shop will leave couple of thao preload on the slide heel when spoting the seal off, just to make sure it is pushing forward HARD. |