RCBS sizing die O-ring size

[SciFiJim]

What size O-ring goes on a RCBS sizing die? I have one without and would like to find the right one at the hardware store.
Jim

[462]

SciFiJim,
If I was in your situation, to be assured of the correct fit, I would take the die with me to the store.

[SciFiJim]

I did. There are a couple that are very close. 7/16 and somthing/64. I was just wondering which one was the correct one.

[largom]

Jim, O rings have a nominal inside Dia., outside Dia., and a sectional Dia. and are usually given a standardized No. If you want the correct one I would contact RCBS and ask what size/number thats used. I don't have any RCBS sizers so can't measure one. If you have another die with an O ring take the O ring with you to hardware store and match it up. Don't forget that the old one may be stretched a little bit. The sectional Dia. [thickness] is important.

Larry

[giz189]

I have nearly all RCBS dies, but I don't recall ever seeing an o-ring on one of them. Is this something new?

[giz189]

Oooops, never mind, I was thinking case sizing die.

[462]

SciFiJim,
I'll bet RCBS will send you one for no charge. Well worth a phone call. Worse case is they'll sell you the proper one. Didn't think of it, earlier.

[SciFiJim]

Actually, neither did I. I am used to getting stuff from the hardware store.
I'll call them when I get a chance.

[357maximum]

The lyman dies that take an O'ring can be replaced by going to your closest sporting goods store that carries good paintball gun supplies. The guns use a real tough yellow/white Oring that is a better replacement than the original ring. They are tougher than jerky made from a 30 year old camel.

[wistlepig1]

I pulled one off my die, they are hard to get a good reading because they are rubbery (go figure). .075 Dia, .758 OD, .585 ID, give or take a few thou. Hpoe that is sum help.

PS, I have one of the HF boxes with every o-ring known to man and not one was right!

[SciFiJim]

PS, I have one of the HF boxes with every o-ring known to man and not one was right!

The O-ring is probably proprietary to RCBS.

Nearest I can figure is 37/64 inner diameter.

[wistlepig1]

Try Ace Hardware, here they have a good number of O-rings in my area.

[high standard 40]

Could you use a caliper to measure the diameter of the o-ring groove in the die, then measure the die body diameter, and figure what size you need. If you can't find what you need locally, check here
http://www.mcmaster.com/#o-rings/=654pzl

[notenoughguns]

The correct o-ring # is 015 from McMastercarr 1/16 wide x 9/16 is x 11/16 os . I know , I ended up with a 100 pcs pack

[1hole]

An interesting thing about O rings; they are so flexible that for most uses they rarely need to be a precise match. Close enough is absolutely perfect most of the time.