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Help - Ring Around the Bullet?

Well here I am needing your assistance again. I did some searching and found differing information, most of it 10+ years old, so I am approaching you knowledgeable folks.

I recently upgraded from Lee equipment to Forster micrometer seating and full length sizing dies as well as a co-ax press. Tonight I was reloading some 223. Hornady brass, Hornady 52gr ELD-M bullets, and 24 to 27 grains of Varget (I'm working up a new load).

As I was loading I began to notice that the seating die was leaving an indented ring around the ogive of the bullet.



Sorry for the poor photo. The grove is deep enough that if you drag your finger nail along the ogive you can feel it. I checked the mouth of the brass and it is right around .002" less than the diameter of the bullet so I don't think it's excessive neck tension causing it. I tried seating some 55gr V-max bullets and there was a ring on those as well, though not as deep as on the ELD-M's. I then looked at some 6.5 147gr ELD-M's that I loaded earlier and there is a slight ring on them from the seater as well. I then seated some of the 52gr ELD-M's with my old Lee seater and not a mark! AAAAAAARRRRRRGGGGHHHH!

I did some research on this and it appears to be more common with the Forster seating dies. Some say that this will not effect accuracy and not to worry about it. Others say to modify the seating stem of the die. Messing with the die itself makes me nervous.

So I have a few questions. Have any of you run into this? Will this adversely effect accuracy? Am I doing something wrong? Any insight and advice will be greatly appreciated
 
Looks like the seating stem is the wrong profile for the bullet you are using. You could gently file the stem down so it better fits your bullets. RCBS will let you send in a bullet to them and they will custom make a seating plug for that particular bullet, I assume Forster probably has the same. I just took a bit of real fine sandpaper to mine and problem solved.
 
Looks like the seating stem is the wrong profile for the bullet you are using. You could gently file the stem down so it better fits your bullets. RCBS will let you send in a bullet to them and they will custom make a seating plug for that particular bullet, I assume Forster probably has the same. I just took a bit of real fine sandpaper to mine and problem solved.
This is where I would look. Wrong stem.
 
You must be running an aweful lot of neck tension to put that kind of pressure on the bullet when seating. Do you have the expander ball/decapping stem in the sizing die or have you removed it?
 
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hot glue into the stem, push in bullet, and presto, matches yor profile. heat it up if it doesnt work for ya. Don't tell anyone I said this....

Very good suggestion! Do any steps need to be taken to prevent the glue from sticking to the bullet and spoiling the profile left in the stem?
 
I am having the same issue with my 6x47L. I’m using a Forester micro seating die and Hornady 105gr match bullets. What I found was when the stem creates the ring on the bullet, it changes the distance from the ogive to the lands. I’m gonna contact Forester about customizing a new seating die stem. Thanks for the info
 
I always just use some lapping compound and kroil on a bullet that I chuck up into a drill, work it back and forth a few times in the stem, then switch to flitz to polish it. Knocks down any high spots that can cause the ring. I've found most brands need this, just did it to a new micro seating stem for my RCBS comp seater.
 
Forster micrometer seating
As mentioned, how much neck tension, and are you cleaning the carbon from inside the case neck (SS pin tumbling). Takes a lot of force to mark the bullet that way. And I have found Forster seating plugs don't fare well with high neck tension. They are very thin at the opening compared with Redding. And once you "bell" them, they don't work properly.

Left 2 are Forster, right one is Redding.
Seating Stem Comparison.jpg

Once you reduce your seating force, as mentioning, sanding the leading edge will minimize any marking. Since I don't have access to all the nice equipment others do, I have to improvise. I take Kabob skewer and wrap sandpaper around the taper. Spin the seating plug in my cordless drill. Works well to modify the edge. I start with 400 grit and take it insteps to 3000 grit.
 
You must be running an aweful lot of neck tension to put that kind of pressure on the bullet when seating. Do you have the expander ball/decapping stem in the sizing die or have you removed it?

Nope. .002" and the expander ball is in there. Necks are clean, I tumble with ss pins Necks are chamfered as well

I'm going to start with smoothing out the sharp edge on the stem and see where that takes me.

Thanks for the input everyone. I'll keep you posted.
 

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