A Mec 310 - I don't believe it. My first press back in 1972 was a 310 a buddy gave me. Didn't know they could be set up for roll crimps. A little while back I tried roll crimping with my 650 - kind a worked/didn't work. I ground the ribs out of the star/ start crimp and that helped. And useing plastic shells with the star crimp part cut off also helped. Plastic has a memory so if useing them cut the last 1/4" or so. And for roll crimps very little start crimp is needed.
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Paul Harm
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Threaded Mode