WTB/WTT RCBS Posi-Primer stems

[triggerhappy243]

I can measure the dimensions of the stems. and post them here.

[marcusp323]

Looking forward to that. Need to make some for mine too.
Mark

[triggerhappy243]

Start with roundstock .241 in dia. THIS IS THE BOTTOM HALF OF THE STEM.

[triggerhappy243]

This is the part that holds the spring loaded cup.

[triggerhappy243]

The primer cup is.295 oal, and the o.d. Is .250 dia.

[IllinoisCoyoteHunter]

Great! One more thing...how long is that .1750 diameter. Thanks!

[TNsailorman]

Good on you, guys. Is this a great site or what! james

[Bayou52]

FYI-

Yesterday, I called RCBS and asked if there were any detailed drawings of the Posi-Prime base that could be shared as I was hoping to use same to perhaps have some bases machined/made. The service rep checked and said there were no detailed drawings available. He did say, however, that the tap in the base into which the primer plug screws, was 8/32 as shown in triggerhappy's above post.

Thanks,

Bayou52

[TNsailorman]

For some reason, RCBS (and others too) are very secretive about drawings for equipment they no longer sell or have parts. I don't know whether it is a "lawyer thing" or it is just that they don't want you to rebuild but rather to buy their new and "improved" versions. I worked in operations and operational control for a large company and it was really silly to what lengths they would go and at no little costs sometimes, just to protect so called secrets for their products when a simple chemical analyst and an average BS major in chemistry could figure things out in short order. Not saying I blame RCBS or others but it seems like they could be loosing good will sometimes with that attitude. Not a rant--just the facts man, james

[triggerhappy243]

great! One more thing...how long is that .1750 diameter. Thanks!

.120 that piece is specifically for small primer.

[triggerhappy243]

For some reason, RCBS (and others too) are very secretive about drawings for equipment they no longer sell or have parts. I don't know whether it is a "lawyer thing" or it is just that they don't want you to rebuild but rather to buy their new and "improved" versions. I worked in operations and operational control for a large company and it was really silly to what lengths they would go and at no little costs sometimes, just to protect so called secrets for their products when a simple chemical analyst and an average BS major in chemistry could figure things out in short order. Not saying I blame RCBS or others but it seems like they could be loosing good will sometimes with that attitude. Not a rant--just the facts man, james

TNsailorman, put yourself in the owners shoes. you did all that R&D for these products, spent all that cash on patents and tooling. would you want someone stealing that and making their own to sell?

[TNsailorman]

I have been in their shoes. If you notice that in my statement I said "Not saying I blame RCBS or others". But if you no longer are supporting a product that you once produced, it is not stealing if someone provides that support. Otherwise, you would not be able to buy parts for your car beyond 3 to 5 years after that model ceased production. After market production is what keeps older cars and many other products working. james

[triggerhappy243]

100 % AGREE JAMES. I do not think rcbs has completely stopped parts support, they may do a run at a later date to refill the shelf when there is enough requests. I wish they would bring back this model. I have 2 of them, and will not use any other model............... even the one with the tray attached.

[TNsailorman]

Triggerhapy243, I have 5 of them. Four have the small primer stem but not the larger primer stem. That is what made me start the search and I have been trying to get the larger sizes for over 3 years now, with no luck. I plan on leaving these for my grandsons for their reloading adventures. I would like to get these 4 complete for them as well as myself. I really appreciate the effort you guys are putting out to make some for me and others that might need the parts. Take care, james

[triggerhappy243]

i will measure the large one and update.

[triggerhappy243]

The primer cup is.295 oal, and the o.d. Is .250 dia.

instead of the punch being .1750 dia., it is .205 dia. all other dimensions are the same.

[IllinoisCoyoteHunter]

Thanks for taking the time to get measurements. When I get some spare time I will see if I can get some cranked out

[triggerhappy243]

Thanks for taking the time to get measurements. When I get some spare time I will see if I can get some cranked out

i am glad I can help.

[TNsailorman]

around to refresh--maybe someone has one and willing to part with it.

[IllinoisCoyoteHunter]

Spare time is hard to come by when theres mandatory overtime....