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Rifles, Reloading, Optics, Equipment
Reloading
Question about custom dies
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<blockquote data-quote="AZShooter" data-source="post: 999560" data-attributes="member: 5219"><p>This discussion is something I have been interested in for a while. </p><p></p><p>I have noticed that the WSMs, RCMs and RUM cases tend to become hard to remove from the chamber after they have been fired a few times. Not the bolt snick at the end of the bolt opening movement but rearward removal. </p><p></p><p>I think it has to do with the thicker brass and multiple firings making the brass more resistant to any springback so they hang up in the rear of the chamber. I have observed that the area just in front of the web has a shiny area where it is rubbing on the chamber wall as it gets extracted. I know the fl die is not sizing this area. I have tried Redding, RCBS and Hornady FL dies in my 338 RCM. I finally had Whidden make a FL/bushing die which helped some but not completely. I spent almost $200 with all those dies. </p><p></p><p>I recently began to do my own barreling and chambering and have tried opening the rear of a chamber by light sanding and polishing which helped some. I finally resorted to making my own small base dies. I use a carbide tool bit and cut off the top of a FL die so shoulder and neck are removed. I then machine off some of the bottom of the die so I have a tapered section that can be incrementally lowered to size the web area. I partially FL size the case after reducing the diameter of the web as the brass gets lengthened in this process. I know a custom FL die with the proper dimensions would solve the issue but I am not ready to pay big money for a custom die with a chambering I may abandon in a year or two. </p><p></p><p></p><p>I talked to Dave Kiff and asked if the chamber reamer dimension vs the FL sizer reamer dimensions are different for thicker brass. He said no they have a set difference between the two. Can't remember the dimension. </p><p></p><p></p><p>Would love to hear what you think MikeCR and dkhunt14.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 999560, member: 5219"] This discussion is something I have been interested in for a while. I have noticed that the WSMs, RCMs and RUM cases tend to become hard to remove from the chamber after they have been fired a few times. Not the bolt snick at the end of the bolt opening movement but rearward removal. I think it has to do with the thicker brass and multiple firings making the brass more resistant to any springback so they hang up in the rear of the chamber. I have observed that the area just in front of the web has a shiny area where it is rubbing on the chamber wall as it gets extracted. I know the fl die is not sizing this area. I have tried Redding, RCBS and Hornady FL dies in my 338 RCM. I finally had Whidden make a FL/bushing die which helped some but not completely. I spent almost $200 with all those dies. I recently began to do my own barreling and chambering and have tried opening the rear of a chamber by light sanding and polishing which helped some. I finally resorted to making my own small base dies. I use a carbide tool bit and cut off the top of a FL die so shoulder and neck are removed. I then machine off some of the bottom of the die so I have a tapered section that can be incrementally lowered to size the web area. I partially FL size the case after reducing the diameter of the web as the brass gets lengthened in this process. I know a custom FL die with the proper dimensions would solve the issue but I am not ready to pay big money for a custom die with a chambering I may abandon in a year or two. I talked to Dave Kiff and asked if the chamber reamer dimension vs the FL sizer reamer dimensions are different for thicker brass. He said no they have a set difference between the two. Can't remember the dimension. Would love to hear what you think MikeCR and dkhunt14. [/QUOTE]
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