When I started casting, I bought a Lyman sizer/luber. Many years later, I ran across an RCBS, too cheap not to buy. It was their old style that used a ratchet for pressure feed, as did the Lyman. But it had issues and was sent back and RCBS replaced it with their new style that used a toggle for pressurization. I much prefer the ratchet. So I called RCBS to see what would be required to convert it. Was told the bolt was different and I could not just change them out. They said I'd have to modify a bolt so that the ratchet would fit. Even though their product was not at fault and it was just my personal preference, they sent me a new bolt and a ratchet. I probably could have done a crude job with a hacksaw and file, but I took it to my late friend that was a gunsmith and machinist. He cut the new bolt right below the hole that the toggle went through and milled a hex on the end of the bolt. Comparing the Lyman and RCBS they use the same dies and top punches---they will interchange. Really not much difference, but the RCBS does hold pressure a little better. I prefer RCBS because of their customer service. I had issues with a Lyman mold and they charged a pretty steep price to fix it.
I gave the old Lyman sizer to a son in law along with a couple of molds, as bait to get him into casting. That was several years ago and he has not bit.
I gave the old Lyman sizer to a son in law along with a couple of molds, as bait to get him into casting. That was several years ago and he has not bit.