Help with why I have shoulder dent

[memtb]

This may not be related, but I was getting dents in my 7mm rem mag brass shoulders when I was running them through the reloading die......turned out that my spray case lube was getting on the shoulders.....now I am careful not to get lube on the shoulder

Even with small amounts of lube……a plugged die vent will cause dents when resizing! memtb

 

[Roperboy87]

It wasn't lube issue. I cleaned the chamber again yesterday afternoon and shot a string of 5 shot and there was no dent on the shoulder so I'm guessing that was it.

 

[Roperboy87]

I can't imagine that the 34.5 gains of Varget is to low of charge as I get ejector marks at 34.8. It is so weird that 34.5 grains Varget with the 144 Berger hybrids with velocity of 2612 is the node when I read lots of folks use much more that that

 

[RockyMtnUT]

I can't imagine that the 34.5 gains of Varget is to low of charge as I get ejector marks at 34.8. It is so weird that 34.5 grains Varget with the 144 Berger hybrids with velocity of 2612 is the node when I read lots of folks use much more that that

36-37.gr of varget is where it should be with that 144. I wonder if you are too close to the lands or touching creating pressure spike early.

 

[Roperboy87]

My thinking must be wrong as usual but 37.gr of varget is where it should be? I wonder if you are too close to the lands or touching creating pressure spike early.

I'm actually pretty far off the lands the truth be told

 

[Roperboy87]

Here's some different load data I have came up with that shoot. The Varget load shoot the best group at distance

 

[emp1953]

It wasn't lube issue. I cleaned the chamber again yesterday afternoon and shot a string of 5 shot and there was no dent on the shoulder so I'm guessing that was it.

Actually, excess lube doesn't necessarily have to be the culprit when resizing. Resizing dies have an air vent hole. if that gets blocked the pressure of air not being able to vent can cause the brass to "give". Lapua brass is pretty darn good brass though. That dent will shoot out and wont adversely effect the performance of the round when it is shot.

 

[Taylorbok]

Actually, excess lube doesn't necessarily have to be the culprit when resizing. Resizing dies have an air vent hole. if that gets blocked the pressure of air not being able to vent can cause the brass to "give". Lapua brass is pretty darn good brass though. That dent will shoot out and wont adversely effect the performance of the round when it is shot.

not all dies have vent holes... redding