Ok, you guys got me curious. Redding Dual ring sizing die. Lyman M-die. .357 mag case.
Why not 9mm as the OP described? As 243Win said, If he is only getting 1 or 2 thousands interference fit he will have set back and his next post will be " Why did my gun blow up?"
So, with .357mag ABLP press, Redding Dual Ring sizing die which sizes the neck to same dia as my RCBS carbide die does, and Lyman M-die which doesn't change the resized dia of the case, only puts a step in it. I will check to see if I loose any dia with the normal sized seating stems.
This about whether an untouched sizing stem that makes an interference fit of .0055" will swage down a soft lead bullet.
I don't have any truly swaged bullets like Hornady sells that is dead soft, only plated and my WW bullets that I can mark with my thumb nail.
Case as fired - .378" outside of mouth
Resized with Dual ring - .373 outside of mouth
- .3525 inside of mouth
Flared with m-die
first step of M-die .3545" second step is bullet starting step= .3600" then tapered flare.
Bullet is plated DEWC 158 gr @.358" dia.
I flared to just enough to get the bullet to stick in the mouth of the case.
Seated to the depth that Lyman seating die was set at. Length was 1.4475 which was just shy of the upper cannular.
Checked neck tension, 44 lbs. Good for normal loads, is more than fine and only light taper crimp.
Wanted to mark the bullet so I knew which end was in the case after I knocked it out.
Knocked apart with RCBS Kinetic hammer. Diameter of bullet was still .3580" No swaging.
I don't see the need to mess with your resizing stems. Plated bullets have really soft cores so I doubt that your lead bullets will be any different.
In fact I will repeat this test with one of my LSWCs that I cast myself to see what the result are with it.
horizontal mark above crimp grove is my thumbnail. Tumble lubed and sized to .358"
base up.
Resized case is same .373" outside, .3525" inside.
Flared with M-die is same as above. .373 inside, .3525" outside, with step to start bullet. Step = .360"
Seated to top crimp groove with no crimp at all. This is about neck tension. Got 60Lbs of neck tension.
Alox probably has something to do with that. I get 60lbs with coated lead bullets also.
Knocked out with RCBS Kinetic hammer.
Size=
base down. .358"
Again, no swaging of WW lead bullet. This is with a case resized to .3545" so again, no need to mess with the sizing profile or dia because of a fear of swaging a bullet to a smaller dia.
I don't have a factory crimp die to see what it will do to a soft lead bullet. I don't want to buy one because I never needed one. I could give it away in the "pass it forward" thread though.
I may have to try to barrow one around here, but reloaders around here are few and far between.