Hello Im new to the forum and heard that this site is where there is the most experts in reloading. I really hope that someone on can help with my situation. I have use the "search" and read many of the old posts and it still does not answer.
Basically the title is my issue: case neck runout.
I noticed that my fired cases have 0 to 0.001, the needles barely moves when spun on the RCBS concentricity gauge.
I clean brass then anneal, the next day I run through the Redding type s fl bushing die with exp ball. I have also tried with RCBS matchmaster fl bushing, same bushing but no exp ball only SInclair exp mandrel. I also measure before putting through exp mandrel. All these methods increased my runout to max 0.004. I did not understand why it was increasing the runout. I tried cleaning die, honing the ball, smoothing out the part that sits on the bushing and still no luck.
I thought that it could be possibly my press. I noticed that my table is kind of tilting as it also sits on a carpeted floor. First I checked any movement on the ram and there was nothing. Then I decided to put my shell holder the other direction this way the case sits against the closed part of the shell holder because the other way I feel that the case slightly moves as the press is tilted and the shell holder opening also allows case to move. (i hope you can picture this)
After doing this I did notice some improvement but not totally removing the runout. I am getting 0.003 still increasing runout from fired cases. So after doing this there is a relation to the position of case in the shell holder inducing runout.
I wanted to try removing the spring in the ram that holds the shell holder but I have no idea how to remove also I notice the the shell holder has no movement on the ram so I doubt removing spring will do anything.
I don't understand. Even if I put the press on a very flat table I will still be getting runout. I will first try the press on a flat surface and see if this does any good.
Pls help before I totally destroy my reloading room to make a new table.
Basically the title is my issue: case neck runout.
I noticed that my fired cases have 0 to 0.001, the needles barely moves when spun on the RCBS concentricity gauge.
I clean brass then anneal, the next day I run through the Redding type s fl bushing die with exp ball. I have also tried with RCBS matchmaster fl bushing, same bushing but no exp ball only SInclair exp mandrel. I also measure before putting through exp mandrel. All these methods increased my runout to max 0.004. I did not understand why it was increasing the runout. I tried cleaning die, honing the ball, smoothing out the part that sits on the bushing and still no luck.
I thought that it could be possibly my press. I noticed that my table is kind of tilting as it also sits on a carpeted floor. First I checked any movement on the ram and there was nothing. Then I decided to put my shell holder the other direction this way the case sits against the closed part of the shell holder because the other way I feel that the case slightly moves as the press is tilted and the shell holder opening also allows case to move. (i hope you can picture this)
After doing this I did notice some improvement but not totally removing the runout. I am getting 0.003 still increasing runout from fired cases. So after doing this there is a relation to the position of case in the shell holder inducing runout.
I wanted to try removing the spring in the ram that holds the shell holder but I have no idea how to remove also I notice the the shell holder has no movement on the ram so I doubt removing spring will do anything.
I don't understand. Even if I put the press on a very flat table I will still be getting runout. I will first try the press on a flat surface and see if this does any good.
Pls help before I totally destroy my reloading room to make a new table.