Edge reloading question

[Gatr]

I just put together a 338 edge on a savage action with a mcgowen prefit.
I'm waiting on my edge dies to show up but I have lee 338 rum dies. I backed off the sizing die and necked up some nosler brass. It chambered fine. I seated a 300 berger .015 off the lands. Now it is very hard to chamber. I marked it with a sharpie and there is a ring where the brass is clearly making contact. I tried bumping the shoulder back further and the ring stays in the same place. The seating die is run out as far as possible so it shouldn't be crimping.
Any suggestions? Should I just wait for the edge dies to show up?
Thanks

 

[MagnumManiac]

I just put together a 338 edge on a savage action with a mcgowen prefit.
I'm waiting on my edge dies to show up but I have lee 338 rum dies. I backed off the sizing die and necked up some nosler brass. It chambered fine. I seated a 300 berger .015 off the lands. Now it is very hard to chamber. I marked it with a sharpie and there is a ring where the brass is clearly making contact. I tried bumping the shoulder back further and the ring stays in the same place. The seating die is run out as far as possible so it shouldn't be crimping.
Any suggestions? Should I just wait for the edge dies to show up?
Thanks

Headspace issue? Custom chambers are never the same between 2 rifles.
I would wait until the correct dies show up.

Cheers.
gun)

 

[Dgd6mm]

Headspace issue? Custom chambers are never the same between 2 rifles.
I would wait until the correct dies show up.

Cheers.
gun)

Bingo! Wait on your die.

 

[K redden]

It looks like the dreaded doughnut to me. Maybe a little to tight in the neck area of the chamber. Hopefully your new dies will correct this, but if not let a good smith take a look at it.

 

[Gatr]

New die. Same problem. Got some RP brass and it chambers fine. Any ideas?

 

[K redden]

Measure loaded neck dia. On both and I bet the rem is smaller . If so the chamber neck dia. Is to small for the nosler or it has a doughnut formed at the neck shoulder junction.

 

[Deleted member 46119]

It looks like the dreaded doughnut to me. Maybe a little to tight in the neck area of the chamber. Hopefully your new dies will correct this, but if not let a good smith take a look at it.

It looks like a doughnut to me as well.

Been there, doughnut that.

I suggest measuring the loaded neck along it's length and verifying that there is no sudden increase in diameter.

I also recommend you get the neck dimensions from the smith. If he went with a tight neck reamer that will mean a change or neck turning.

I really recommend neck turning anyway. Just enough to clean up the brass and ensure no doughnut. Use an oversize expander ball or expander die.

Anotherway you can tell if it's a doughnut is to remove the expander ball from your sizer, run the brass through and then feel for the doughnut.