Dent on the fired brass

[tigerpan]

I got dent on the case after fired the round. I fired about 30 round two of the case has dent
The round fire from t3 lite 300 win mag
The load I used the once fire hornady brass
Rcbs full length size
Hornady 150 grain bullet fmj bt
Imi 4064 powder 63.5 grain

[f4tweet]

Did you size the brass to your chamber after measuring your chamber?

[repomanNWP]

That looks like a "short stroke" type of dent. Still, having fired the round should have expanded that dent right out. Sorry, I'm at a loss.

[CSACANNONEER]

Looks more like a dent from too much lube while sizing.

[hermosabeach]

I have never seen a fired round develop a dent from the firing process....

What type of rifle? Semi Auto and rounds being thrown onto the ground???

[M27]

is that after shooting or after sizing?

[tigerpan]

Looks more like a dent from too much lube while sizing.

im stupid. you are right.
i just check the log book, I did have the 3 brass has dent when i used too much lube.
i guess the mark i made it came-off.

[tigerpan]

I have another question, is normal have stress mark on the neck?

[pacrat]

That dent absolutely happened "after" firing.

Hot brass ejected from a rifle is pretty maleable until it cools.

[DSMeyer]

I have another question, is normal have stress mark on the neck?

That looks to be chamber imperfections, either from a dirty chamber or a improperly reamed chamber. Think of it this way, the new or reloaded round is a bit smaller than the chamber for ease of insertion, when it is fired the brass expands to completely fill the chamber and seal it off so all of the remaining gasses burn up and propel the bullet out. This expansion will hammer any imperfections into the malable brass case. The the case will cool and shrink enough for extraction.

[M1NM]

I have another question, is normal have stress mark on the neck?

I bought a 09 Argentine Mauser with a 30-06 barrel. Had the same mark from being drilled to deep before it was reamed. I had it rechambered to 300 Weatherby.

[mark501w]

Light load gas escaping past neck & shoulder before sealing.

[tigerpan]

I bought a 09 Argentine Mauser with a 30-06 barrel. Had the same mark from being drilled to deep before it was reamed. I had it rechambered to 300 Weatherby.

I will let gunsmiths check over.

[tigerpan]

Light load gas escaping past neck & shoulder before sealing.

I used medium load, min is 61 and max is 65.

[mark501w]

Boost your load the dent will go away