Rolling Shoulders

[idcwby]

I did the same thing with 338 edge I had to chamfer a bit more than I'm used to but once I got that figure out it's been smooth sailing.

I chamfered one real good and ran it through the sizing die. Still had the same issue.

 

[lancetkenyon]

Too much neck tension is my guess. Use a .306" expanding mandrel before loading.

 

[idcwby]

Too much neck tension is my guess. Use a .306" expanding mandrel before loading.

Mines reading .3055 from the looks, do I need to go more?

 

[lancetkenyon]

If the bullets are hard enough to seat they are rolling shoulders, I say yes.

 

[The Oregonian]

if you seat a different bullet does the same thing happen? Have you tried lubing the inside of the neck To see what results that gives for loading?

 

[idcwby]

if you seat a different bullet does the same thing happen? Have you tried lubing the inside of the neck To see what results that gives for loading?

I seated 212gr ELDX with no problems.

I had a random piece of fired Nosler brass, assuming it's been resized because it had no primer in it, laying on the bench and it took the Alco bullet without issue.

After talking with everyone here and experimenting, I think the ADG brass neck is to tight or hard and not allowing the bullet to seat correctly.

 

[Korhil78]

I had this happen with ADG brass before. I just put some Redding dry lube on the inside of the neck with a qtip and it fixed the problem.

 

[Korhil78]

I also stopped using the expander button on the die. I just take it off and use expander mandrels to get the neck tension I want but I always use dry neck lube on the inside of my case necks now.

 

[P7M13]

Is your die screwed down to touch the shell holder on the ram? If so, back it out two turns, then readjust seating depth.

 

[idcwby]

I had this happen with ADG brass before. I just put some Redding dry lube on the inside of the neck with a qtip and it fixed the problem.

Shouldn't the HbN on the bullets be doing the same thing?

 

[idcwby]

I also stopped using the expander button on the die. I just take it off and use expander mandrels to get the neck tension I want but I always use dry neck lube on the inside of my case necks now.

These were brand new, so I didn't think I needed to run them through the sizer because I seated the ELDXs previously with no issues.

 

[idcwby]

Is your die screwed down to touch the shell holder on the ram? If so, back it out two turns, then readjust seating depth.

No it's not.

 

[sp6x6]

I run new brass ,meaning necks or expander mandrel,because many are distorted or small dents from shipping.Seeking consistent neck tension

 

[RockyMtnMT]

Is the brass long?

I always full length size new brass.