Quote from: Ds J on Apr 08, 2023, 03:10 PMWaar kry ek 14mm o-rings?

Enige ingeneurswese winkel. Iets soos Fowlkes Brothers in Paarden Island. Mica of Midas mag dalk ook hê.

Dit hoef nie noodwendig 14mm te wees nie. Tussen 10mm en 14 mm werk. Mens moet net die dikte gebruik volgens jou headspacing mate. Ek moes 1.8mm dikte gebruik. As ek dit op die patrone sit vir my vrou se 303 dan maak die slot nie toe nie.

Dankie

correct me if I am wrong !

Ds J - u can use anything to keep the case against the bolt face, I enjoy finding a way to do things without the correct tools. The Prestic works or so it seems, but there is a bit of cleaning up, really no big deal. I struck on the idea of using Cody's old Lu Bands (remember the craze back then).
When the firing pin hits the case with too much head space the case moves forward under the pins motion and then expands backwards off the shoulder support expanding the case till it hits the bolt face. This action stretch's the web area. The bands Prestic -string whatever keeps the case against the bolt face when firing and the case then can not stretch backwards, it then fireforms at the shoulder forward. You are effectively fireforming a case to that rifle chamber.
https://www.takealot.com/small-rainbow-rubber-bands-bracelet-jewellery-making-kit-mini-cr/PLID73054707

Adendorff - they have an Oring set of 225 pieces for R85.

Hi Janfred

I understand that you've got a successful workaround, but I reckon one of these would do the job:

https://leeprecision.com/collet-die-only-303-british

The agents, Nicholas Yale, have in the past been very helpful for me with ordering stuff that they don't keep in stock. They only do wholesale so normally you've got to formally place the order through a gunshop but if you give them a call they should be able to make a plan.

PS: I know Treeman doesn't particularly like these dies but I like them and use them on my .308, 7x64 (uses a 280Rem die) and .223 (die bought from Treeman)

Another mistake.

Turns out you cannot turn a Lee 9mm sizing die shorter in the lathe. All you do is remove the steel rim that keeps the carbide ring in place. Then you end up with a carbide ring stuck around a case and hunting around for a new sizing die.

So, when people tell me that sand or primer residue will damage their carbide sizing die I just smile.

Quote from: Tripodmvr on Apr 08, 2023, 06:15 PMAdendorff - they have an Oring set of 225 pieces for R85.

These are great and excellent value. It's almost not worth replenishing them if particular sizes run short at the asking price for a whole set. They've saved me a number of times when  project was about to run into a brick wall for the want of an oring or two.