Bumping shoulder

[spudgun]

How can I bump the shoulders when I have a Small base die and I already have the shell holder camming against the bottom of the die?

 

[BoydAllen]

First of all how are you determining that you actually need to bump?

 

[Str8tShtr]

Grind off the bottom of the die

 

[GLShooter]

Grind the top of the shell holder. It is easier and cheaper if you screw it up.

 

[ELR LVR]

How can I bump the shoulders when I have a Small base die and I already have the shell holder camming against the bottom of the die?

Shave the base of the die
I use a cut off wheel on a grinder, since a cut off wheel is smooth on the side and doesnt gouge it like a rough grinding wheel will
Soft pressure.
measure OAL of the die, shave little at a time, maybe .010" until you get what you want
---
Some guys use comp shell holders that are shorter
I personally dont mind shaving my die if I need more bump
the Die does not need to contact the shellholder to accomplish it's task

 

[LRPV]

Shave the base of the die
I use a cut off wheel on a grinder, since a cut off wheel is smooth on the side and doesnt gouge it like a rough grinding wheel will
Soft pressure.
measure OAL of the die, shave little at a time, maybe .010" until you get what you want
---
Some guys use comp shell holders that are shorter
I personally dont mind shaving my die if I need more bump
the Die does not need to contact the shellholder to accomplish it's task

Could you please provide me a link to these competition shell holders that are SHORTER?

 

[L.Sherm]

Could you please provide me a link to these competition shell holders that are SHORTER?

I dont believe they are shorter, there designed for less bump not more

 

[L.Sherm]

I would grind the top off a shell holder i just had to for my brothers 280AI Redding die.
I had to do the same thing for my 6.5x300wsm When I used a Redding 300WSM bushing die.

 

[ELR LVR]

Could you please provide me a link to these competition shell holders that are SHORTER?

Redding Competition Shell Holder Set #2 (7-30 Waters, 30-30

The Redding Competition Shellholder Kit consists of five shellholders in varying heights with increments of .002". Allows you to increase or...

www.midwayusa.com

I have not used these so L.Sherm may be correct in that they are taller.
Like I mentioned, I find it easy to simply trim my die
(Plus they are easy to chuck in a lathe and trim) Shellholders are pretty hard
Plus trimming the die removes some of the chamfer by doing so at the beginning of the die entrance
which effectively sizes more of the case length.
---
I suppose you could do both
Trim your die, then use the comp shellholders if they are taller by +.002" each to tune it in
if you feel you need to feel shellholder contact with the die
I prefer not to bump the shellholder into the die and stress the press

 

[LRPV]

Redding Competition Shell Holder Set #2 (7-30 Waters, 30-30

The Redding Competition Shellholder Kit consists of five shellholders in varying heights with increments of .002". Allows you to increase or...

www.midwayusa.com

I have not used these so L.Sherm may be correct in that they are taller.
Like I mentioned, I find it easy to simply trim my die
Plus it removes some of the chamfer by doing so at the beginning of the die entrance
which effectively sizes more of the case length.
---
I suppose you could do both
Trim your die, then use the comp shellholders if they are taller by +.002" each

I get tired of people recommending these taller shell holders that most definitely will make the problem worse. There’s so much anecdotal misinformation on this forum anymore, it’s ridiculous.

 

[mikecr]

Seems like a marketing snafu with the Redding shell holder set.
Nobody struggles to bump less. That's just not a problem.
Their set should adjust opposite of current, so that folks wouldn't have to grind their junk.

That's what she said

 

[ELR LVR]

I get tired of people recommending these taller shell holders that most definitely will make the problem worse. There’s so much anecdotal misinformation on this forum anymore, it’s ridiculous.

Yeah well I dunno why people cant just trim their die.
it is likely the die thats the issue, (chamber cut a few thou too deep, die a little long etc)
more than a problem with any shellholder.
But, like I said, some people think they need to bump the die with the shellholder
so....trim the die -.010, then accompany a custom bump depth with the + shellholders set
---
Now lemme ask, is the Comp shellholder actually taller overall or....
is it the surface that pushes up on the head of the case taller? (raise the floor, effectively then
the FLOOR, to the TOP of the shellholder would be SHORTER) same as someone grinding the top of their shellholder down.
then they should work to bump more, right?
---
Because like others have said, I dont see how a well known company like redding would put out something useless that would result in actually bumping less

 

[Murray Brook]

I would grind the top off a shell holder i just had to for my brothers 280AI Redding die.

Just had a 280AI built and had to do the same for my die (Lee). Also had to hone out the neck as there was too much neck downsizing.

 

[K22]

First of all how are you determining that you actually need to bump?

Before you start grinding shell holders and dies, you should answer this question.

 

[Webster]

How can I bump the shoulders when I have a Small base die and I already have the shell holder camming against the bottom of the die?

If you can easily chamber an as fired case you don't need to bump.

 

[Ringostar]

We need Guffy back, to properly explain all of this! Relax now, a sense of humor is required to understand this.

 

[JFrank]

Yeah well I dunno why people cant just trim their die.

My dies are case hardened beyond grade 8, shell holders are softer.
I took a few thou of my shell holder in about ten seconds on a belt sander.

 

[cranky]

Because like others have said, I dont see how a well known company like redding would put out something useless that would result in actually bumping less

You're right, that appears to be what Redding has done- marketed shellholders that reduce headspace by lowering the floor (to get a longer base to shoulder dimension). They say it makes the process precise by eliminating "error" from backing out the die. The solution for a tight chamber would be to grind the bottom of the die or the top of the shellholder, the opposite of what the comp shellholders do.

Source:

https://redding-reloading.com/wp-content/uploads/918-REV-Competition-Shellholder-Set.pdf

 

[PhilC]

Grind the top of the shell holder. It is easier and cheaper if you screw it up.

What I did and worked just fine.

 

[DShortt]

I personally would modify a shell holder if I found I needed more setback at the shoulder datum. I'd use abrasive paper on a flat base such as a piece of scrap granite counter top. Monitor the amount of material removed until I got where I wanted to be.

There is more than one way to reach this goal. Not claiming mine is superior. Just makes the most sense to me and my way of thinking.