Lyman / RCBS Lubesizer dies not nessesarely interchangable

[Brassman66]

Just a heads up - safe yourself some money and learn from my mistake.

Recently I purchased this very neat Lubesizer which I was told is a Lyman 45. (No markings on the Machine) This is old equipment possible made some 50 years ago but good quality just the way Iike it. I was told by several People that Lyman and RCBS Lubesizer Dies are interchangeable. This may be the case with the newer Lubesizers which use a Nut to secure the Lubesizer Die in the Machine.

My 45 Lyman Lubesizer uses a setscrew which holds the Die providing the Die has a dedicated grove machined in under the Oring grove.

Unfortunately my .357 Lubesizer Dies stamped RCBS does not have this Groove and not enough space to machine a Grove in so I guess I have to trade this Resizing Die off.


Cheers

 

[Rod B]

Just a heads up - safe yourself some money and learn from my mistake.

Recently I purchased this very neat Lubesizer which I was told is a Lyman 45. (No markings on the Machine) This is old equipment possible made some 50 years ago but good quality just the way Iike it. I was told by several People that Lyman and RCBS Lubesizer Dies are interchangeable. This may be the case with the newer Lubesizers which use a Nut to secure the Lubesizer Die in the Machine.

My 45 Lyman Lubesizer uses a setscrew which holds the Die providing the Die has a dedicated grove machined in under the Oring grove.

Unfortunately my .357 Lubesizer Dies stamped RCBS does not have this Groove and not enough space to machine a Grove in so I guess I have to trade this Resizing Die off.


Cheers

I have used an RCBS .458 sizing die in my Lyman 45 & did not have a problem. I got the die from a shooting buddy perhaps the die had been modified.

 

[slug]

The older Lyman 45 luber used a set screw to hold the die in place. This was long before RCBS got into the cast bullet game. If your older dies don't have a rubber O ring to act as a seal, then they are the older style which had a sharp edge inside the die to shear it to the proper size. Dies which have this O ring have a taper which squeezes the bullet to size, rather than cutting them. Much better. Perhaps your dies could have a groove machined in them for the set screw, if they aren't too hard on the inside.

 

[Brassman66]

The older Lyman 45 luber used a set screw to hold the die in place. This was long before RCBS got into the cast bullet game. If your older dies don't have a rubber O ring to act as a seal, then they are the older style which had a sharp edge inside the die to shear it to the proper size. Dies which have this O ring have a taper which squeezes the bullet to size, rather than cutting them. Much better. Perhaps your dies could have a groove machined in them for the set screw, if they aren't too hard on the inside.

First off, except for the only lonly RCBS Lubesizer Die market as such, all my other Lubesizer Dies show only markings for the size of Bullets, no marking if the are Lyman or whatever. They could be homemade by a hobby Machinist.

All have an Oring but the Oring Grove on the RCBS is for a much fatter Oring and about 1/16 lower then the others which I presume to be Lyman. Because the Oring Grove is lower there aint enough "Meat" to cut another grove for the setscrew. It sort of works but by no means perfect.

Cheers

 

[jethunter]

First off, except for the only lonly RCBS Lubesizer Die market as such, all my other Lubesizer Dies show only markings for the size of Bullets, no marking if the are Lyman or whatever. They could be homemade by a hobby Machinist.

All have an Oring but the Oring Grove on the RCBS is for a much fatter Oring and about 1/16 lower then the others which I presume to be Lyman. Because the Oring Grove is lower there aint enough "Meat" to cut another grove for the setscrew. It sort of works but by no means perfect.

Cheers

All my RCBS dies are stamped "RCBS".

I got a new RCBS die that was too fat to fit ion my new Lyman 4500. Had to turn it down a few thousandths to get the die to fit in the machine. I have about a dozen RCBS dies that I use regularly and they all fit without mods except for the last one.

 

[Brassman66]

The older Lyman 45 luber used a set screw to hold the die in place. This was long before RCBS got into the cast bullet game. If your older dies don't have a rubber O ring to act as a seal, then they are the older style which had a sharp edge inside the die to shear it to the proper size. Dies which have this O ring have a taper which squeezes the bullet to size, rather than cutting them. Much better. Perhaps your dies could have a groove machined in them for the set screw, if they aren't too hard on the inside.

Thanks for another piece of information I was not aware off, re. Dies without O-Ring. I dont have one but I just recently had one offered to me and saw a picture of one and now glad I did not purchase this piece.
Thanks again and Cheers to you.