Forster seating dies

[Cwlongshot]

In case any of you are Forster users I am working with Forster on this:

FW: I have your co-ax press and the 2 die sets for 204, 22-250, 243, 260, and most recently 6mm ARC and 223.  What I am finding with the 6mm ARC is that the seater tube is leaving a very noticeable impression aka "ring around the collar" on the bullets.  I have seen others reference this on you tube so sounds like I am not the only one having this issue.  I'm wondering if you have a solution?  I may look to see if I can swap in the 243 stem and see how that goes.
 
Note:  I am loading conventional varmint bullets in the 65-87gr range and not the new style long and heavy.  I did push back a couple of factory loaded Hornady 105 black and it did not seem to imprint on the jacket.


To me this comes down to:  WTF were they thinking?  The bullets are the same (but different) but I would sure think that the old 243 stem would be better than that sharp drinking straw POS they are using.   


Pic of the 243 Win and 6mm arc stems:

As mentioned. Some of the bullets we use have pretty soft jackets. The mandrel can be a lil sharp too. I have polished most I own. 

Another point is neck tension. Do you know yours? Might be a lil heavy. 
personally Id polish the sharpness out and look at neck tension. 
good luck
CW