Fire forming question

[Mr Underbridge]

Hey folks Im having my rifle built right now and I have a question.
Im using PTG 6.5x47 bore rider custom reamer which uses the 6.5 AI gauges.
I am assuming that I will need to fire form the brass since I am using regular 6.5x47 lapua brass?
Normal lapua has 30 degree shoulder and this one I have is 37 degrees.
Should I actually fire form it or get hydraulic forming dies from whidden?
Also can i turn the necks now while the brass is unfired?

 

[Bc'z]

With my limited experience I'd say seat bullets at jam with a good load to form brass.
You'll be accomplishing a couple of things at the same time.
Barrel break in, scope dialed in "roughly" brass formed and preliminary load work.
Or get a hydraulic die to form your brass and still have to accomplish other tasks.
I've never counted how many rounds down the tube, but if I did I'd want to make every shot count, and accomplish as much as possible per shot.

 

[Mr Underbridge]

Thanks for your input. I ordered the hydraulic die and a custom sizing die using my blue print.
Now I have to get PMA and get a custom angle carbide bit for neck cutter.

 

[DocDoc]

You may also be able to set it up like an Ackley. If you are not moving the position where the shoulder meets the neck, set it up with .003-.004 crush on the parent and use a middle load for the parent to fire form.

 

[dkhunt14]

If not, you can neck turn them and then use a 7mm expander and make a false shoulder. I prefer to turn to shoulder junction before fireforming because that usually takes care of donuts. Matt

 

[Mr Underbridge]

I will be using the hydro die and custom sizing die followed by turning the neck. I figured by that point the neck itself is not gonna be doing much moving?