The O-ring test...

[rogn]

Just wanted to add that with the O ring system in place by putting witness marks on your press and dies with a magic marker. This makes the installation or adjustment very accurate and easy. Repeat abilty is ensured.

 

[memilanuk]

I either use a Forster Co-Ax, where the dies are able to float/self-align on their own, or a modified tool head in my Dillon 550 (usually the one from Whidden) with the pins and modified die rings that accomplish the same thing. Gets to the same end point, but feels less squishy than the O-rings I used to use on my Redding presses (M25 and Big Boss).

 

[mike06]

Ok this will bring up a whole new bunch of comments all positive I hope here goes. I have a Redding T7 that I reload with and I am going to try the o-ring method. Currently it is set up with 223 and 308 Competion seating and neck bushing dies along with the body dies and the 7th is a decapping die. I know the turret will rock a little when using the press more with the neck and boby dies than the seating dies. I do use a small shim at the rear of the press to minimize the rock or stop it completely. Ok do I use O-rings under all the dies and how much pressure is best to put on the o-ring? I guess what I mean is how much float in the movemen? Thanks Mike

 

[JRS]

Ok this will bring up a whole new bunch of comments all positive I hope here goes. I have a Redding T7 that I reload with and I am going to try the o-ring method. Currently it is set up with 223 and 308 Competion seating and neck bushing dies along with the body dies and the 7th is a decapping die. I know the turret will rock a little when using the press more with the neck and boby dies than the seating dies. I do use a small shim at the rear of the press to minimize the rock or stop it completely. Ok do I use O-rings under all the dies and how much pressure is best to put on the o-ring? I guess what I mean is how much float in the movemen? Thanks Mike

With that particular press, I doubt you'll gain anything.

 

[T-shooter]

You don't need much pressure. The o-ring just centers the shell holder on the ram like the snap ring does. Smaller is probably better. Also use a little lube in the ram, holder surfaces to allow them to float easier.

 

[mike06]

You don't need much pressure. The o-ring just centers the shell holder on the ram like the snap ring does. Smaller is probably better. Also use a little lube in the ram, holder surfaces to allow them to float easier.

I think I will just start with the 223 dies and see what happens. The press does have a .004 rock in it if I fail to shim it. Thanks . I am retired so time is what I have plenty of at the moment. I do have a K&N press with a 308 Wilson Seating Die just not ready to jump in on the 223 wilson die just yet.

 

[nmkid]

For a long time, if I didn't pay attention, my cases would want to enter the die kind of offset. So I went with "O" rings on the die and the shell holder. Haven't had a case try to bind up entering the die since

 

[Barlow]

I replaced the C clip that retains the shell holder with an O ring (as thousands of other have) to allow the shell holder to float to find center of the die. And yes I use O rings under lock nuts wherever found on reloading dies. Barlow

 

[mike06]

I replaced the C clip that retains the shell holder with an O ring (as thousands of other have) to allow the shell holder to float to find center of the die. And yes I use O rings under lock nuts wherever found on reloading dies. Barlow

What size o-ring for the ram did you use?

 

[Barlow]

What size o-ring for the ram did you use?

Mike, I really don't know the exact size, but any that will fit snug around the grove will work fine. Barlow

 

[USMCDOC]

I am always amazed that some seem to want multiple published verification of something that they could easily determine for themselves, by doing an easy to perform experiment. All that is required is an O ring, and a concentricity gauge. Yes, it works.

But Boyd, it is less expensive to ask someone else then to discover it on their own..

 

[Dusty Stevens]

I prefer to go with the great jackie schmidt’s method- make the ram loose enough that it doesnt influence the case going into the die. Let the die do the work. Even with cheap rcbs dies i dont have concentricity issues and my concentricity gage gathers dust 99% of the time.

 

[Link]

How about bumping your die with the shell holder at full stroke then tighten the lock ring? That should square the die ?
Don

 

[Murray Brook]

How about bumping your die with the shell holder at full stroke then tighten the lock ring? That should square the die ?
Don

That's how I do mine

 

[BoydAllen]

What If your proper die setting does not have your shell holder in contact with the die? How do you handle that?

 

[dickn52]

Lee has been doing this for a few years now.

 

[Link]

What If your proper die setting does not have your shell holder in contact with the die? How do you handle that?

Good day sir.
I use a shim or spacer like a coin or washer.

 

[Murray Brook]

What If your proper die setting does not have your shell holder in contact with the die? How do you handle that?

Wouldn't the shoulder of the case being set back not true the die.

Sorry I misread post #53. I took it for granted that there was a case in the shell holder.