Thread: What in the world?

Ok team, I need the brains trust to help me out on this one. My brother was out today shooting some reloads he had made for him. Projectiles are Hornady 162 ELDX, rifle is a Sako A7 7mm rem mag.

The rifle was used by the reloader during load development and field tests.

Brass was new before load work

Any idea what could cause this?

pretty much bog standard case head seperation I would say......someone tried to get two too many loads out of brass and forgot to use paper clip feeler guage to check for thin spot.... the very reason I partial length resize and not full resize each time...my poohseventy is very hard on brass if full length resized,it will do what yours did after half dozen loadings.

but IF its as said new brass....HORNADY NEED to be told about it.

Hope he didn't pay the guy.
Looks to be massively over full length resized.
Collapsed the case due to pushing the shoulder way back. I presume the dents were there before firing?
Head seperation the result. Even easier for it to happen as the cartridge is head spaced by the belt not the shoulder, hence the primer will look OK and won't have backed out.

I presumed the dents WERENT there before...who in right mind would fire round that deformed???? I presumed they were from using some sort of ramrod attachment to remove case from chamber....interesting to hear which it is....

Nightmare reloading clusterf--k

Yeah she's fucked mate !!

Probably need a little more info, was that the first round he fired & what was the load data ?

PS - Good on you for not "naming & Shaming" who it was yet, it's a small group of professional reloaders around here & if it's one fulla's I know he would never over load, I'd give em ring & see what they have to say

Originally Posted by Micky Duck

pretty much bog standard case head seperation I would say......someone tried to get two too many loads out of brass and forgot to use paper clip feeler guage to check for thin spot.... the very reason I partial length resize and not full resize each time...my poohseventy is very hard on brass if full length resized,it will do what yours did after half dozen loadings.

but IF its as said new brass....HORNADY NEED to be told about it.

I'm yet to experience this myself, I've full length sized Winchester brass over and over (some saw 7 or 8 full length sizings) in my rem mag before I knew any better and none of them did this.

Pretty sure he said it was new brass but will have to confirm.

Originally Posted by Micky Duck

I presumed the dents WERENT there before...who in right mind would fire round that deformed???? I presumed they were from using some sort of ramrod attachment to remove case from chamber....interesting to hear which it is....

They could have occurred on firing. Not % sure how. There is also carbon visible in the dents.
Need more info from OP.

Originally Posted by zimmer

Hope he didn't pay the guy.
Looks to be massively over full length resized.
Collapsed the case due to pushing the shoulder way back. I presume the dents were there before firing?
Head seperation the result. Even easier for it to happen as the cartridge is head spaced by the belt not the shoulder.

Can confirm dents were not there before firing...

Working on more info team, these are questions I hadn't thought of

Ok so this was no the first round fired of the batch nor was it the first if the day. Rifle had been cleaned before range session, days beforehand.

https://www.24hourcampfire.com/ubbth...ase_seperation
Got photos of loaded rounds?

Ok no photos of loaded rounds yet, we love on different islands.

Case was removed from the action with a swab on a cleaning rod from the action end so no ramming of rods for the dents. Theory from the other range attendees was the dents may have been caused by back blast from the suppressor...I'm not convinced?

Dents caused by pressure going up the ouside of the case after case head separated

Originally Posted by Ryan_Songhurst

Dents caused by pressure going up the ouside of the case after case head separated

Ah ok I can see that

Originally Posted by Philipo

Yeah she's fucked mate !!

Probably need a little more info, was that the first round he fired & what was the load data ?

PS - Good on you for not "naming & Shaming" who it was yet, it's a small group of professional reloaders around here & if it's one fulla's I know he would never over load, I'd give em ring & see what they have to say

She's cooked alright not sure on load data as far as charge weight but muzzle velocity and drop validation was underway when this occurred. Was Sadi to be chronied at 2950fps from 21 inch barrel 7mm rem mag. That's about 35fps lost per inch compared to my A7 with 24" barrel.