Forster Micrometer Die

[kimberguy2004]

My Micrometer seating die leaves a ring on the bullet just above the olgive. I havn't shot any of the rounds, but it looks like it won't touch the lands. Even if they shoot OK, it still doesn't look right and that bothers me and it's a lot of money to spend o a die that turns out a product that looks like that. I've read that Forster will "tweak" the die to make it right for a specific brand bullet, but what's the sense in having a die that is proprietary to only one brand of bullet? That defeats the purpose of having an adjustable die

 

[Shooter32]

It is more than likely to much neck tension instead of your seating die . When you have to put force with the seating dies you will put a ring on the top of the bullet, it will not affect the accuracy . But try less neck tension and see if it doesn't go away .

 

[kimberguy2004]

I'm loading new Winchester brass, so it has only been neck sized, not full length. The neck of a loaded round measures .272", so for a Redding S-Bushing die, the correct die size should be .271", which it is. When I pulled the bushing out of the die to check the size of it, I didn't notice which side was up. I don't know if the bushing is "tapered", but if it is I guess installing it upside down could put the small dimension on the bottom and the case would be oversized. Anyway, I reinstalled it with the print on the bushing facing up. is that correct?
Wow, it's tough being a noobie...

 

[kimberguy2004]

These rings often occur when the bullet is seated over a compressed charge.

But the real culprit is mostly the sharp inner edge of the seating cone. It cuts into the bullet jacket when seating the bullet.

You can take off this edge with some #800 carbide paper. Take the seating stem and chuck it in a hand drill, and take a piece of #800 carbide paper and round the inner edge of the cone.

The seating cone is not fitted to one bullet, it is usable with all bullets, once the sharp edge is removed.


.

Can I just unscrew the die body and take it apart. The base of the die is spring loaded and when you install it you compress the spring. I don't want to have parts flying all over the room when I take it apart..

 

[rstreich]

Just to add a bit: It's the Wilson bushings that have a taper to them--0.0003" I think it is.

OTOH, I do have some TiN Redding bushings that will size differently depending on which end is up.

robert