You switch to estates, you go to what I've found to be one of the most inconsistent shells ever. I've mentioned this on here before, one shell could beat the crap out of your shoulder and the next could go "puff" and the wad barely clear the barrel. I try to avoid estates, I just take the boxes from people who do shoot them. And not only are they inconsistent but smell bad too. JMHO
As I recall , a Super Sizer is a collet-type resizer that will not reduce the thickness of the flange . If you can check a MEC "Reconditioner" , I think you'll find that the ring-type resizer can be adjusted to squeeze the flange . The pitfall may be that in squeezing the flange , it may increase the OD of the flange because I think the flange will be unrestrained . Please verify that .
also , the reconditioner will deprime a case whereas the I don't think super sizer does ---- if that is of any consequence .
Jolly,I would suspect your load data (the components you are using) or loading process may be contributing more to shell inconsistencies than the hull. I, like many others, have reloaded tens of thousands of estate hulls and they work just fine.
Doctor....Try to find a "MEC CASE CONDITIONER".....This was a perfect tool for any Mec reloaders bench. It resized oversized heads upon depressing; took care of the rim thru proper adjustments and removed the old primer all in one pull of the handle. Dies were available for converting to 10mag thru 410. Over a few years I have collected 5. Just as "Ford" nutzed away the Thunderbird Mec did the same by no longer offering the CASE CONDITIONER,...RUN'EM....Danny B