robroy
10-16-2013, 04:35 PM
I just did an impact cast of my chamber. It extends about a 1/2" up the rifeling but the rifeling is barely visable on the cast. At the muzzle the rifeling is clearly visable on the cast. For about 1/32" forward of the case the diameter is 0.3650". The rest of the cast measures 0.3586".
It seems to me I should be using pills of about 0.361 or0.362. The Ranch Dogs I cast with my 2 cavity are dropping at 0.360 or so as advertised. I'm going to cast some tonight to be sure. All of them I've cast so far have been sized to 0.359.
I may be looking for a new mould that casts big or failing that lapping my mould bigger.
What do you fine folks think?
Yes it's a microgroove
It seems to me I should be using pills of about 0.361 or0.362. The Ranch Dogs I cast with my 2 cavity are dropping at 0.360 or so as advertised. I'm going to cast some tonight to be sure. All of them I've cast so far have been sized to 0.359.
I may be looking for a new mould that casts big or failing that lapping my mould bigger.
What do you fine folks think?
Yes it's a microgroove