6.8 western from 7 SAUM brass

[Wilderness Blacktail]

This a fairly new rifle. I would say roughly 70 rounds down the barrel. I fired 20 factory rounds and have successfully loaded 165 ablrs shooting sub moa consistently. I haven't had any weird issues other than occasionally the bolt closes a little rough but not often enough that I'd consider it an issue. And it does it with both factory and hand loads. Its a new seekins precision Havak ph2. Im not completely new to hand loaded but i am absolutely new to fireforming. The primers are fairly old as i bought them from a ol boy who had them for who knows how long. Primers are so hard to come across i figured I better just snag em up. Other than that all components are new. View attachment 617860View attachment 617861

Copy all that.

Does that primer feel like its backed out of the case at all? Almost looks like it could be.

 

[Dashizzle37]

Copy all that.

Does that primer feel like its backed out of the case at all? Almost looks like it could be.

It feels flush to the case. Doesn't seem to have backed out.

 

[Wilderness Blacktail]

It feels flush to the case. Doesn't seem to have backed out.

And all the other primers looked like that? Like very mild.

 

[Dashizzle37]

And all the other primers looked like that? Like very mild.

All primers look good. The other case i had an issue with that didn't fire, the primer looked expanded on one side and not the other. Deformed is the best way I can explain it. Unfortunately I didn't handle it long enough to get a picture.

 

[Wilderness Blacktail]

All primers look good. The other case i had an issue with that didn't fire, the primer looked expanded on one side and not the other. Deformed is the best way I can explain it. Unfortunately I didn't handle it long enough to get a picture.

That is very odd. I think I would cull those primers.
I dont know that a primer could make a mild/normal load exhibit very high pressure like the case that died tho.

 

[Dashizzle37]

That is very odd. I think I would cull those primers.
I dont know that a primer could make a mild/normal load exhibit very high pressure.

That is very odd. I think I would cull those primers.
I dont know that a primer could make a mild/normal load exhibit very high pressure like the case that died tho.

I'll pull apart the other loads. Hopefully some new cci will and a lighter load fix the problem. Thanks for your help.

 

[Wilderness Blacktail]

I think I would create a specific post on this and see what comes from it. Something is going on here and Im not sure the primer could do it.

It would make sense if somehow a heavier bullet was used, much longer C.O.L and bullet was heavily jammed or the charge got increased heavily (dont think thats possible as I wouldnt think theres enough room)

 

[can1010]

Hey all,
I am new to this forum business and am trying to figure out sizing 7 saum to 6.8 western. I have successfully fireformed 18 pieces of brass from 7 saum to 6.8 weatern. However there is a reason I only have 18 pieces. One case did not fire and it seemed it may have been a bad primer I disposed of the case and have continued when I have had time. Yesterday evening I shot 10 more of the loads I used for fire forming 54 gr of imr 4350 and speer hotcore 150gr bullets. Seated just over spec as it seemed to be jamming the lands. On the 8th case the primer flattened and it almost looks like the case tried to separate. I'm not real sure why this happened as all other cases are forming perfectly. Any idea why this might be happening? It going to bug me unless there is a reasonable explanation. Hope someone can help me out with more knowledge than myself. Thank you!!!View attachment 617768View attachment 617769

with a primer like that tells me your case was short and your bullet wasn't jammed. when sizing down your 7saum brass best to back your die out a 1/4-1/2 turn and only partial size the neck, a false shoulder is best option and will eliminate the case head separation. make sure your bullet is jammed tight into the lands. roughly .015- .020 into the lands not just touching the lands. you are not over pressure that primer backed out of case and slammed bolt face and when case expanded it forced the primer back into the case, common problem when cases are too short.