Bought a die-set in 9,3x64 from Lyman. It has a very rough finish inside of the sizer-die. What is the best way to polish it, without getting tolerances/dimensions to wide?
I saw something on this on Varmint Al's website: Apply Flitz to a patch wrapped around a bore brush and use your drill or screw gun to polish the interior.
George
------------------ Shoot straight, shoot often, but by all means, use enough gun!
Posts: 14623 | Location: San Antonio, TX | Registered: 22 May 2001
I've used a simular method, apply a light oil to the die, bend a piece of 1200 grit carberundium paper around a new bronze brush and rotate it in the die.
I'll give you one advise; get rid of that damn Lyman die set.
I too have a Lyman die set in 9,3x64, and that is way too tight. I tried to polish it using water sand paper with very very fine sand. After I did that the die was as smooth as a childs ass, but still it didn't work. It's so tight that when I resize my brass it get those bulges (bulkete).
It's a known fact that the metric dies from Lyman are tight.
Get in touch with a reseller of RCBS or Redding and get them to order one for you. It costs a bit more but it saves you the frustration.
Chuck the die in a lathe and use a dowell with some 400 grit wet/dry emery cloth.Run the Lathe at 300 RPM. Polish it lightly, then move to 600 grit. Finish with 800 grit. You will wind up with a very nice surface finish. You won't remove any appreciable amout of metal. This is how rifle chambers are polished!-Rob
Posts: 6314 | Location: Las Vegas,NV | Registered: 10 January 2001
snip It's a known fact that the metric dies from Lyman are tight.
Get in touch with a reseller of RCBS or Redding and get them to order one for you. It costs a bit more but it saves you the frustration.
Magnar
I have a sneaky little feeling that this may also be the case with Redding. My 9.3x62 either has a slack chamber or the Redding die is 'small base' style. I got Lee to make me up a set based on 2 fired cases and a bullet. This works well and doesn't work the brass near so much.
No way you can judge all metric dies on this but if you've got a bit of time the Lee custom route is cheap and good - a die custom made for your chamber.
Posts: 2258 | Location: Bristol, England | Registered: 24 April 2001
Thanks for all help! The die is a litle narrow, but I think it is OK when I have get it polished. I think I will try the method given by robgunbuilider first.
460WBY: I dont know you very good I can say, but do you come from one of the "North Eastern Walleys?"
When you purchase a machine tool, it should be ready to do the job. If it's not "finished' it needs to be sent back to the manufacture. It's not our job to finish machine tools.
Same as Robgunbuilder but insted of the dowel use 1/4" brass rod cut a slot in it (lenghtwise 1/2" long) tear strips of emery 1/2" wide ,insert one end in the slot and roll up to the desired diameter chuck in to hand drill turn lathe one way drill other way.
Regards Martin
Posts: 328 | Location: Alberta Canada | Registered: 25 June 2001
