Forster Co-ax long die workaround

tantoco1

FNG
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Mar 4, 2026
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Anyone figure out a workaround for the Forster co-ax and long dies? There’s a good deal on one locally, but I use SAC seating die, I’ve read the micrometer is too long and protrudes into the Y in the press arm. Curious if anyone figured out a workaround?
 
You can make a new handle, have another press or move to arbor seating dies. That's about your choices. I primarily use arbor dies...but I still have my original rockchucker I can use in a pinch.
 
I’ve got a Dillon 750 and Rock Chucker. Trying to get to a simpler solution, really focused on precision rifle and the 750 is more headache than benefit. I wonder what kind of clearance is needed, could you just grind a notch in the arm to provide clearance?
 
Anyone figure out a workaround for the Forster co-ax and long dies? There’s a good deal on one locally, but I use SAC seating die, I’ve read the micrometer is too long and protrudes into the Y in the press arm. Curious if anyone figured out a workaround?
Not sure if you are aware. There are two handles for the Co-Ax. The old presses came with a shallow yoke in the handle. The new ones, guessing been out 10 years or so? Have a much deeper yoke. I don't have any SAC micometer seaters but the new handle clears the Forster and a few other brand mircrometer seaters I have.
 
The newer style yokes still don't work with all dies. Mine is 3 or 4 years old and won't clear a 7PRC Hornady micrometer seating die if seating long bullets to long COALs. It fits redding dies fine.
 
The SAC Infinity die is sweet as well. Use it on a few chamberings. But I get wanting to use what you already have which I’m sure what the OP is trying to do.
 
I would love to know what you find out. I use the forster seater and a redding seater and they both clear no problem. Went with those because of what you mentioned.
 
Not sure if you are aware. There are two handles for the Co-Ax. The old presses came with a shallow yoke in the handle. The new ones, guessing been out 10 years or so? Have a much deeper yoke. I don't have any SAC micometer seaters but the new handle clears the Forster and a few other brand mircrometer seaters I have.
Good to know. Bad news is I reached out to pick up the local one and it sold. So will be looking out for another one.
 
The newer style yokes still don't work with all dies. Mine is 3 or 4 years old and won't clear a 7PRC Hornady micrometer seating die if seating long bullets to long COALs. It fits redding dies fine.
That’s what I’m loading as well. Sounds like the co-ax is a no go
The SAC Infinity die is sweet as well. Use it on a few chamberings. But I get wanting to use what you already have which I’m sure what the OP is trying to do.
Good to know. Thank you.
The newer style yokes still don't work with all dies. Mine is 3 or 4 years old and won't clear a 7PRC Hornady micrometer seating die if seating long bullets to long COALs. It fits redding dies fine.
Thanks for the confirmation. I’m using that super long sac type 4 die as well. Sounds like it’s a no go
 
Anyone figure out a workaround for the Forster co-ax and long dies? There’s a good deal on one locally, but I use SAC seating die, I’ve read the micrometer is too long and protrudes into the Y in the press arm. Curious if anyone figured out a workaround?
I have a Co-Ax as well. I bought it before those SAC seating dies were available. I remember reading (cannot remember where - probably LRH forum) from someone with a lot more experience than me that there was no practical way to make that combo work.
 
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