RCBS Dies Bad?

larr

larr

New member
hello everyone, i have a set of 204 and 222 dies that will throw the necks of cases out of round. i can take a new piece of brass and check the neck run-out on my rcbs concentricity gauge and its about 3 or 4 thousands out, but when i run it through the full size or the neck sizer dies the neck are out of round by 15 to 20 thousands out on both the 204 and 222 brass. i changed out the shell holder to see if that would help but its the same thing. I'm thinking of buying redding dies maybe they will be better. has anyone had this problem before? any help will be appreciated.

larr
 
I guess even RCBS could put out a bad set of dies but I'd sure try this before sending back to them. Their customer service is excellent should a return be necessary.

Bullet runout can usually be traced to the expander plug and can be improved by first polishing the plug. Chuck stem in drill and run while holding crocus cloth or very fine emery cloth on plug until it has high polished finish. Next, set the die up with the plug just below the neck sizing portion of the die so that the case is held centered in the die as the expander plug enters bottom of case neck. Another trick that often helps is to put a small rubber o'ring under the expander plug stem lock nut and just snug the nut (don't over tighten). This allows the plug to seek it's own center as it is pulled out of the case.

Be sure to clean case necks good and lube w/graphite and I'll bet you see a great improvement in your runout.

Setting the plug so high may cause you to have to de-prime in a separate operation.

Regards,
hm
 
thanks,i will give that a try and see if it helps. i have a polishing wheel on a bench unit that i will try.
 
Originally Posted By: hm1996I guess even RCBS could put out a bad set of dies but I'd sure try this before sending back to them. Their customer service is excellent should a return be necessary.

Bullet run-out can usually be traced to the expander plug and can be improved by first polishing the plug. Chuck stem in drill and run while holding crocus cloth or very fine emery cloth on plug until it has high polished finish. Next, set the die up with the plug just below the neck sizing portion of the die so that the case is held centered in the die as the expander plug enters bottom of case neck. Another trick that often helps is to put a small rubber o'ring under the expander plug stem lock nut and just snug the nut (don't over tighten). This allows the plug to seek it's own center as it is pulled out of the case.

Be sure to clean case necks good and lube w/graphite and I'll bet you see a great improvement in your run-out.

Setting the plug so high may cause you to have to de-prime in a separate operation.

Regards,
hm

well i tried everything that was mentioned above and still the same. i decided to check my other two rcbs die sets that i bought at the same time as the 204 and 222 and they do exactly the same thing. i tried and old set of rcbs 30-06 dies that i bought years ago and they are fine,actually they straighten the neck like they should. i really like rcbs equipment but this is starting to make me wonder.
 
Since none of that worked, I'd give RCBS a call Monday @ 1-800-533-5000. I'm sure they will take care of the problem for you.

Regards,
hm
 
larr...another thing to do...measure case & mark where the deviation occurs, then resize the case & measure again ....just to see if deviation relocates to a diff spot...not that this will fix anything .
 
EL,i tried different shell holders with the same results.
CL, i will give that a try and see what happens.
it is occurring with other rcbs dies also,i bought four sets of dies at the same time at the same place and all do it.not saying it has anything to do with it maybe its coincidental. i have a old set of 30-06 dies that are fine. if something weird is going to happen it will happen to me lol
 
well so much for customer service, called rcbs today and waited 45 min. for a rep then he told me that my problem is normal.i cannot believe that. if that is normal for rcbs dies i guess i will switch to redding dies.i am very disappointed in rcbs,i thought they would have been better then that. thanks everyone for your help.
 
Back
Top