Squib load...bullet stuck

[450BM]

23,000 PSI Est. https://discover.dtic.mil/

Yeah, and that’s still not enough PSI to do what this thread is about. Something is missing from the story.

 

[450BM]

Yes, but that's with an open flash hole, correct?
OP stated the brass had no flash hole.

Correct. So what happened to all the pressure from the primer in my test? One shot barely moved the bullet, the other one shoved it in the rifling .5 inches.

 

[DShortt]

Correct. So what happened to all the pressure from the primer in my test? One shot barely moved the bullet, the other one shoved it in the rifling .5 inches.

The primer alone doesn't create enough volume/pressure to even unseat the bullet in one case, just lodged it in the leade in the second case.
Not sure what you expected?
I still believe what the OP experienced was the result of a significantly reduced charge and the powder combusted erratically. Some powders do not behave well in significantly reduced loads. I think the primer hole was/is actually there, it's just full of powder residue that only partially combusted.
There's a disputed but documented scenario called Secondary Explosion Effect (SEE). I am not versed well enough to attempt to defend or refute this. On occasion things are seen which do make me believe that there is validity to it.
What I took from it is loadings below minimal charges with slower powders is not something I am interested in experimenting with.

 

[wedgy]

Send it to Remington and they will fix it up real good for you !

 

[450BM]

The primer alone doesn't create enough volume/pressure to even unseat the bullet in one case, just lodged it in the leade in the second case.
Not sure what you expected?
I still believe what the OP experienced was the result of a significantly reduced charge and the powder combusted erratically. Some powders do not behave well in significantly reduced loads. I think the primer hole was/is actually there, it's just full of powder residue that only partially combusted.
There's a disputed but documented scenario called Secondary Explosion Effect (SEE). I am not versed well enough to attempt to defend or refute this. On occasion things are seen which do make me believe that there is validity to it.
What I took from it is loadings below minimal charges with slower powders is not something I am interested in experimenting with.

I expected pretty much what happened in my test. Please read the rest of my posts.