For the .357 I was using 18 bhn lead and a regular check made from aluminum. When I transitioned to the .44 pb with that same lead the soda can check tore all to pieces. I softened the lead to 16 and tried again.
My .357 and .44 like powder coated bullets for some reason, my 45/70 not so much. So I coat my .44 with some smokes. I left one bullet uncoated and ran it thru the cycle with the other coated bullets. I tested it for hardness when it air cooled. It was now 15 on the scale.
I use a spray lube and pre-size them. Then resize with the soda can checks on. I still get a torn up one now and again, especially it I get the bullet a little off center going into the NOE sizer. But the softer lead and the lube helps.
Accuracy is just a tad better with the check but I'm not totally convinced I need them. No leading either way. Maybe if I was pushing them a little harder the check may play a larger role.