redding s sizing die

[rebs]

is it normal for it to cam over getting the right shoulder bump or am I doing something wrong ?

 

[jepp2]

is it normal for it to cam over getting the right shoulder bump ?

Generally on Redding dies, I either don't have shell holder contact or very light shell holder contact for proper sizing. But it all depends on your rifle headspace. On my 223AI, I needed to remove some material from the top of the shell holder to properly size the case. I chose to reduce the height of the shell holder rather than shorten the die. Cheaper and easier for me.

 

[AlNyhus]

It also depends more than a little on the press you're using. A bit of cam-over does a lot of things right.

 

[K22]

As post #3 states, a lot depends on the amount of play in your press. Mine is 50+ years old and I have to use cam-over to even produce a zero bump. With that said, I full size all the time but only bump, when necessary, usually after about 3 firing or so.

Your bump gauge and caliper will provide the information necessary to make the optimum die adjustment. After that you can use Redding Competition Shell Holders or Skip Shims to make adjustments without having to change the lock ring of your die. Those devices make sizing adjustments a lot easier in my experience.

 

[skeeljc]

Cam over just assures that you have a precise and repeatable relationship between the die and the shell holder. Think of the press as a spring. You want the force between the shell holder and the die to be greater than the force required to size the cartridge.

 

[rebs]

Thanks for the replies.

 

[rebs]

As post #3 states, a lot depends on the amount of play in your press. Mine is 50+ years old and I have to use cam-over to even produce a zero bump. With that said, I full size all the time but only bump, when necessary, usually after about 3 firing or so.

Your bump gauge and caliper will provide the information necessary to make the optimum die adjustment. After that you can use Redding Competition Shell Holders or Skip Shims to make adjustments without having to change the lock ring of your die. Those devices make sizing adjustments a lot easier in my experience.

where do I buy the skip shims

 

[CJ6]

where do I buy the skip shims

You can make your own by using feeler gauges cut into 2 strips (one on each side of the die).

 

[powderbrake]

Here they are.
skips shims

If you are going to use them under a die, start of setting up the die with a 005 or 006 shim in place , then you can adjust up or down.

 

[rwj]

Cam over just assures that you have a precise and repeatable relationship between the die and the shell holder. Think of the press as a spring. You want the force between the shell holder and the die to be greater than the force required to size the cartridge.

Cam over also ensures that the force is applied twice during each handle stroke…

 

[K22]

where do I buy the skip shims

I purchased mine at Sinclair now owned by Brownell's.

They fit under the lock ring and allow you to change the amount of sizing by changing the shim size. I have used them for years and they work very well for me. They are inexpensive and can be used with any standard die diameter.

 

[D-4297]

Picked up a RCBS - RS 2 at a Garage sale that was almost new for a very good price . This press has two "Ears" on it , that act as a "positive stop" when the Ram is raised to full extension . I set my Sizing Dies in relation to the "stops" and can control my Bump within a consistent .001 , and that works for me . The same with my Seating Dies . Sometimes ; things just work out in your favor .