What is roll sizing?

I've bought a lot of nice brass off eBay at very reasonable prices so I started looking for 45 ACP brass and noticed one seller saying his was roll sized. He even put the 'roll sized' in capital letters so there we be no misunderstanding.

What the heck is roll sizing?

thanks,

Dear Phil: .45 acp brass fired in some barrels develops a bulge around the base. Personally, I've never experienced that after thousands of reloads, but apparently some do. For a cure, a machine has been invented that resizes the cases all the way to the extractor groove. Cost is several hundred dollars. Apparently, it operates by rolling the case sideways through a set of dies that brings it back into factory specs. This machine is available in other calibers too, e.g., .38 Super. If you need to know more about the machine, let me know and I'll dig up a reference. - CW

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Chuck Jacksonville, FL

# I've bought a lot of nice brass off eBay at very reasonable prices so # I started looking for 45 ACP brass and noticed one seller saying his # was roll sized. He even put the 'roll sized' in capital letters so there # we be no misunderstanding. # # What the heck is roll sizing? # # thanks, # Phil # Instead of pushing a case into a die from the bottom end and then punching them out, you can roll the cases between two parallel bars suitably profiled and gapped. This supposedly takes out the bulge that the regular type of sizing die doesn't hit. However, if a case is that bulged, I don't want to use it. It IS a faster way of doing things, which is why the heavy-duty reloader types like them. Personally, I prefer to do my own sizing and case prep, then I know what's been done to the brass. I can catch really bulged and dinged cases and scrap them.