Necessary neck turning before fire forming

[pilediver]

I'm going to be fireforming 6 BR to 6 BRA and it's a .268 neck, so I need to neck turn before fireforming.
Does this look right?
Or should I go a little less into the shoulder like the second picture?

 

[moajoe]

If you have fire formed brass for the 6 bra, measure the neck length then trim the new brass to that length. You just want the portion of the neck that will be holding the brass trimmed after fireforming.

 

[M-61]

The first picture is what I like. Pictures are a bit hard to go by so I’ll add the second pic does not appear to have barely touched the shoulder

 

[jepp2]

I'm going to be fireforming 6 BR to 6 BRA

Does the neck shoulder junction move during the forming? If it does, I would just turn the neck enough for firing clearance, then after you have formed, do the final pass and end as you desire on the shoulder.

I reformed some 30-06 brass for my 25-06. With this large neckdown, the junction moved considerably. So turning after forming worked much better.

 

[JFrank]

I'm going to be fireforming 6 BR to 6 BRA and it's a .268 neck, so I need to neck turn before fireforming.
Does this look right?
Or should I go a little less into the shoulder like the second picture?View attachment 1554959
View attachment 1554958

Good job

Yes , turn prior to fire forming and only go into the shoulder about one revolution.

 

[mikecr]

Looks perfect to me.
like this:

 

[bozo699]

Either is fine, having plenty off will help preventing donuts
Wayne