I got it for 9mm and 45 ACP to ensure functioning in my tight chamber pistols...the 223 conversion came out this year so I went for it. The sizer runs $700+ for the manual version.
Anyway, everything I load in those three gets rolled before loading.
The roll sizer only does a small amount of the case just above the extractor groove. I noticed a fired case increased in length about. 005" after roll sizing and then after FL sizing cases to short to be trimmed in the Giraud essentially disappeared. My guess is the roll sizing makes the case dimensions more consistent than a sizing die alone can.
I use batches of brass of the same headstamp firing it the same number of times until the primer pockets start to loosen up then that batch is retired.
Once I got a roll sizer I noticed the brass was much more consistent when trimming with the Giraud.
Czechmate fired single shot with no mag in gun...inspection of brass not yet fired shows weak construction right were these failed...wasn't even to SAAMI max when these failed...
1000s fired with other brass at much much higher power with no problemo...
Primers don't always show signs of pressure...these once fired Browning cases failed early in 9mm load development...other brands went well beyond this load with no problems...pays to sort and test...
Based on using my borescope...jacketed with slower burning powders do remove most of the lead but not all of it. I haven't been able to demonstrate that the remaining lead after jacketed changes anything.
My Czechmate did the same thing and it turned out to be the pre travel screw moved and prevented the trigger from resetting. Cold weather made it worse.
Springfield Loaded Target functions fine after a new firing pin, adjusted tension on extractor, modified the slide stop and had a pistol smith work on the trigger. Too loose to be accurate but it does function.
My Springfield had this problem with all mags...turns out my slide stop was walking out a bit...cut a groove in it to keep it in place...problem solved...