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#2896803 - 12/15/15 01:23 PM Trimming 204 Ruger cases.
Hogstir Offline
Seasoned Member

Registered: 05/07/05
Posts: 283
Loc: San Tan Valley, AZ.
I have an AR in 204 Ruger and started using a small base die set to bump the shoulder back.
Normally I trim cases after sizing, but according to the instruction from RCBS you adjust the sizer die by screwing it down until it touches the top of your case, then 1/8 turn more. They clearly state that you should use one of your longer cases to perform the adjustment.
If I adjust the die to a 1.85 length case, but then run 1.84 cases thru it, won't it set the shoulder back to differing positions?
In this case should I be trimming the cases BEFORE sizing?

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#2896819 - 12/15/15 02:20 PM Re: Trimming 204 Ruger cases. [Re: Hogstir]
AWS Offline
Moderator

Registered: 02/01/03
Posts: 5617
Loc: NM
I'm pretty sure they are talking about touching the shoulder of the case to the shoulder part of the die and not the top of the neck.
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#2896829 - 12/15/15 03:00 PM Re: Trimming 204 Ruger cases. [Re: Hogstir]
GLShooter Offline
PM Sponsor

Registered: 01/09/05
Posts: 5188
Loc: AZ
Originally Posted By: Hogstir
I have an AR in 204 Ruger and started using a small base die set to bump the shoulder back.
Normally I trim cases after sizing, but according to the instruction from RCBS you adjust the sizer die by screwing it down until it touches the top of your case, then 1/8 turn more. They clearly state that you should use one of your longer cases to perform the adjustment.
If I adjust the die to a 1.85 length case, but then run 1.84 cases thru it, won't it set the shoulder back to differing positions?
In this case should I be trimming the cases BEFORE sizing?


You turn the die into the shell holder without a case in place. It wants to deal with the case body and shoulder. case length has no impact on the RCBS sizer.

Always trim after sizing.

Greg
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#2896838 - 12/15/15 03:27 PM Re: Trimming 204 Ruger cases. [Re: Hogstir]
Hogstir Offline
Seasoned Member

Registered: 05/07/05
Posts: 283
Loc: San Tan Valley, AZ.
Ok, Thanks for the clarification guys.

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