ltrshooter
Active Member
- Joined
- Feb 6, 2011
- Messages
- 26
I am loading for 308 and have a Sinclair case length trimmer and a Forster that I use only for turning the outside of the neck. The problem is I know I do not have even neck tension even if the outside is concentric because the pilot that goes into the brass fits some brass and is very difficult to fit inside other necks.
I tried aForster inside neck reamer but it is supposed to be used before brass resizing and it does not engage the neck at all then. If I use the reamer after resizing, it cuts too much out.
I believe Sinclair and K+M make mandrels to make the neck inside dimension uniform. I cannot find instructions as to how they work. Do I need to get one of these and by pushing the brass out, then trim on the outside only? Do I need to get a custom sized inside reamer to use on my Forster and use it after resizing?
The bottom line is even if I have perfect concentric outside neck dimensions ( I do have a dial gauge to measure this) I know my neck tension is variable when the collet that goes into the neck while turning the outside fits with variable tension.
I don't know what to do. Please help
I tried aForster inside neck reamer but it is supposed to be used before brass resizing and it does not engage the neck at all then. If I use the reamer after resizing, it cuts too much out.
I believe Sinclair and K+M make mandrels to make the neck inside dimension uniform. I cannot find instructions as to how they work. Do I need to get one of these and by pushing the brass out, then trim on the outside only? Do I need to get a custom sized inside reamer to use on my Forster and use it after resizing?
The bottom line is even if I have perfect concentric outside neck dimensions ( I do have a dial gauge to measure this) I know my neck tension is variable when the collet that goes into the neck while turning the outside fits with variable tension.
I don't know what to do. Please help