Kinetic puller o-ring

schumach · Mar 18, 2018

The o-ring for my Dillon kinetic bullet puller has fallen apart into multiple pieces so I cannot get an accurate measurement on the diameter. I am hoping someone has a kinetic bullet puller (brand should not matter) that can provide me with the diameter of the 0-ring. I figure I can just pick it up at the local auto parts store.

Thank you,
Greg

rfwobbly · Mar 18, 2018

Go to your local hardware store with the 3 piece collet and try different sizes. Typically, the plumbing section will have a huge o-ring selection.

jell-dog · Mar 18, 2018

I use the proper size shell holder for brass size to replace the 3 piece collet.
Your mileage may very.
JD

9mmepiphany · Mar 18, 2018

You can use a shell holder in your kinetic bullet puller in place of the collets

Equestrian · Mar 18, 2018

Home depot or any auto parts store will have small assortment packs. Check the faucet repair section at HD. For the fuss of getting it exact they have little blister packs with a dozen sizes or so for <$5.

ColtPythonElite · Mar 18, 2018

I also use a shellholder instead of the collet.

daboone · Mar 18, 2018

You can do it that way or try this replacement and make using a kinetic bullet pulling less of a hassle.
https://www.quineticscorp.com/products/uni-chuck-shim-fit-combo

clearcut · Mar 18, 2018

I use the shell holder when I have to use the kinetic puller ,I mostly use the Hornady cam lock in the press it's so much more civilized .

CC

Varminterror · Mar 18, 2018

Shell holder. Done.

Blue68f100 · Mar 18, 2018

Be noted that if your using a shell holder and have a High Primer you can set it off on impact. This is why a collet is preferred to minimize the movement of the brass. With a shell holder you have ~0.010" of free movement, which kind of works like a slam fire without the FP.

mcb · Mar 18, 2018

A small rubber band would work fine. Probably not last as long as the O-ring but also cheaper and easier to find.

hdwhit · Mar 18, 2018

Go to the toy aisle of any big-box store. Look for the rubber band style ammunition for some of the children's toys. They are the right size and right tension to replace the original and you can get a bag of 100 for about $5.

Catpop · Mar 18, 2018

Call Dillon! Finished!
In your mail ASAP!

Wish you were here man! I have 5-6 big oring assortments in my shop! I’ve had to replace them over the years, no big deal!

9mmepiphany · Mar 18, 2018

Blue68f100 said:
which kind of works like a slam fire without the FP.

Wouldn't a slam fire, by definition, require a firing pin?

Blue68f100 · Mar 19, 2018

Yes, the reason I said without a FP. The slam fire in this case is the brass shifting forward in the holder making the high primer shift forward suddenly (impact). Just something to be aware of if your using a shell holder and not the collet.

schumach · Mar 19, 2018

I would like to thank everyone for the suggestions.

I was able to pick up a 6 pack of o-rings at Home Depot for a bank breaking $2.40. Here is the part and size information: PartsmasterPro #240 (58266B) [3/4" OD x 5/8" ID x 1/16"]
I put the new o-ring on and removed a couple of rounds and it worked as it should.

In addition to posting on this forum I emailed Dillon and they actually suggested that I go to the local auto parts store and try different sizes.

Thanks again,

doubleh · Mar 20, 2018

I keep an o-ring kit around for problems like this but the shellholder is a free and permanent fix.

marchboom · Mar 20, 2018

I have heard numerous reports of rounds going off when a shell holder is used in a kinetic puller. Ever wonder why no one have marketed a kinetic puller that uses shell holders?

9mmepiphany · Mar 20, 2018

marchboom said:
Ever wonder why no one have marketed a kinetic puller that uses shell holders?

Never wondered, I'd think it would have been obvious that it would have increased the cost to the user...especially if they didn't already reload on a single stage press

I have heard numerous reports of rounds going off when a shell holder is used in a kinetic puller.

A more pertinent observation would be if you had been present to determine what actually caused the detonation

Catpop · Mar 20, 2018

schumach said:
In addition to posting on this forum I emailed Dillon and they actually suggested that I go to the local auto parts store and try different sizes.

That sure does not sound like the Dillon I have known since the 1980s! Hope this isn’t a new trend!!!

marchboom · Mar 21, 2018

9mmepiphany said:
A more pertinent observation would be if you had been present to determine what actually caused the detonation

It would but unfortunately I can't be everywhere all the time. I never gave it a thought until I read numerous posts on reloading forums stating this problem. Even if it is a very rare occurrence it's not worth taking the chance.

9mmepiphany · Mar 21, 2018

marchboom said:
Even if it is a very rare occurrence it's not worth taking the chance.

Most of reloading is about risk assessment...especially when you're talking about things that can explode. A key is understanding the dynamics in play when engaging in different processes

We all have to determine our own risk tolerence

George P · Mar 21, 2018

Call Dillon; ask them for a few.

George P · Mar 21, 2018

If Dillon won't help, call RCBS; most likely all made by the same supplier who just changes the color of the plastic from green to blue to red ot orange

PWC · Mar 27, 2018

If you have kids with braces, ask thier orthodontist for some of the rubber bands

Kinetic puller o-ring

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