New at reloading need opinion

[dellet]

No it means I took 25cm brass and ran it thru the resizer. Bad idea I'm learning.
Kids down so I can get some measurements.
Alpha brass
Neck
Brass that I have not touched. .283
unfired but loaded. .286
Fired .290
Yes I can place a bullet into a fired neck takes a little pressure to but not much.

Yes I have a Go gauge I used scotch tape for the No go.

I think you might have stumbled on to the problem, something sucks.

Leaning toward brass, but it could be the measuring device, might be the operator.

.283 & .286 make sense a.003” interference is not un common.

.286” less .257” leaves brass .0145” thick. A bit much for my taste but no big deal.

The problem is .290” fired and any tension at all from the bullet slipping in. You have .002” clearance. This assuming the inside diameter is consistent.

There is a phenomenon known as a donut that form inside the neck and shoulder junction. This can cause the bullet to be pinched in the case and cause a pressure spike.
You might be able to feel when the bullet hits this tight spot. The bullets you are using will be ideal for this, they will possibly ratchet down and basically click every time a grove passes the tight spot. I think if you solve why .002” of clearance requires any force other than gravity to drop the bullet into the case, you might be able to move forward.

Double check your numbers, but I would certainly give this some attention.

I would add that comparing case capacity of the hornady and Alpha brass could provide another clue.

 

[bozo699]

I think you might have stumbled on to the problem, something sucks.

Leaning toward brass, but it could be the measuring device, might be the operator.

.283 & .286 make sense a.003” interference is not un common.

.286” less .257” leaves brass .0145” thick. A bit much for my taste but no big deal.

The problem is .290” fired and any tension at all from the bullet slipping in. You have .002” clearance. This assuming the inside diameter is consistent.

There is a phenomenon known as a donut that form inside the neck and shoulder junction. This can cause the bullet to be pinched in the case and cause a pressure spike.
You might be able to feel when the bullet hits this tight spot. The bullets you are using will be ideal for this, they will possibly ratchet down and basically click every time a grove passes the tight spot. I think if you solve why .002” of clearance requires any force other than gravity to drop the bullet into the case, you might be able to move forward.

Double check your numbers, but I would certainly give this some attention.

I would add that comparing case capacity of the hornady and Alpha brass could provide another clue.

Unless I read it wrong this happened with new brass which wouldn’t have a donut however you still may be onto it as he may be seating the base below the neck shoulder junction, the bullet may have a large pressure ring which could reduce that .002 clearance on its exit. @std7mag do those bullets have a pressure ring?
Wayne

 

[dellet]

Unless I read it wrong this happened with new brass which wouldn’t have a donut however you still may be onto it as he may be seating the base below the neck shoulder junction, the bullet may have a large pressure ring which could reduce that .002 clearance on its exit. @std7mag do those bullets have a pressure ring?
Wayne

I think the bullet he’s using is just over 1.5” long. If that’s correct, he has about 3/8” of bullet below the base of the neck

Edit to add

Same company, different cartridge, same problem

Post in thread 'Case issue?'

Today at 7:57 AM

It appears, to me, that when I run the mandrel into the neck it distorts the shoulder/body intersection, that with a tight chamber maybe giving me issues

That sounds to me like you're necks are too clean and/or just not slippery enough, and/or. . . if you're annealing, they're being over annealed.

• Straightshooter1