Please Take a Look at This Dasher Brass

[walker2713]

I bought about 225 pieces of Lapua 6BR brass fireformed into Dasher from a friend who’s had to give up centerfire shooting.

About a dozen had an easily discernible ring just below the bottom of the shoulder.

What caused that?

Is it usable?

Thanks for looking,

George

 

[ASbobcat]

I bought about 225 pieces of Lapua 6BR brass fireformed into Dasher from a friend who’s had to give up centerfire shooting.

About a dozen had an easily discernible ring just below the bottom of the shoulder.

What caused that?

Is it usable?

Thanks for looking,

George

View attachment 1255315

This is normal. The crease is the old 6BR shoulder location and will go away over time through repeated firing/resizing cycles.
You will notice that the location is identical in each case, approximately .100 thou below the new shoulder.

 

[walker2713]

Thanks for the prompt response.....

 

[ASbobcat]

Thanks for the prompt response.....

Welcome

 

[boltfluter]

To mild of a load while fire forming. Crank it up a little.

Paul

 

[Twdmar]

To mild of a load while fire forming. Crank it up a little.

Paul

This makes sense. I don't shoot a BR variant but when forming 6xc cases I will sometimes use a powder that is fast for a 6xc. H4350 is the traditional powder but cases formed with reloder 15 come out nice and crisp, especially with the bullet jammed in the lands. Plenty accurate too.

 

[dkhunt14]

To mild of a load while fire forming. Crank it up a little.

Paul

Yep, they don't look fully formed, pretty rounded yet. Matt

 

[johara1]

Necks are really short on some, How long is your chamber? ....... jim

 

[AckleymanII]

Cases may look like that when a light fire forming load is fired, really bad idea to shoot light fire forming loads. 90% full power loads are a good idea.

 

[Lefty Trigger]

I had this same issue when playing around with 6mmBRX. Hated forming the brass and went back to the standard BR.

 

[dkhunt14]

Are these neck turned? Matt