RK,

That’s what I did. CPA sent a bullet (with the rifle) that they seated in my rifle, the Mos product that they offer. I took dimensions from it and the throat dimensions that CPA gave me. That info was given to Accurate to make the mold. 

I could have bought the Mos mold but it’s a single cavity and I have a Paul Jones single cavity mold for my .40-70 Sharps CSA rifle. That mold works well. I just wanted to have more than one cavity for the CPA .38-55. Accurate did make the mold right where it should be to replicate my starting dimensions.

One key to this effort is the hardness of the alloy. The softer the better for breach seating the bullet. And if the bullet dimensions are on the “large” side, going a bit softer lets some of those dimensions sneak a bit closer to smaller.

Unlike most readers here, this is my only CPA and my first breach seating effort….so lots to learn!

Tom

It will emotionally bond you to that piece of walnut and you can watch it turn from a featureless chunk of wood into a living thing.

The last two rough stocks I got were  terrible.I should of sent them back....but my wood !  Hopefully the new guys have the stock duplicating down a little better ???  My other stocks from years ago were always done very well.....The thru bolt hole that I had already done is off center from the duplication...no excuse for that ,dont know if I will have enough wood on one side,my wood,my drilling dead on ..then screwed up

My experience was similar. I entrusted them with a beautiful piece of quartersawn fiddleback walnut for a Ballard and the stock I got back looked like it was mortised by a blind beaver, but in fairness the outside was shaped ok. The barrel channel in the forend was several degrees out of kilter, but luckily there was enough meat left on it to allow reshaping the outside to conform to the channel. This was two years ago.