I have recently been dabbling in paper patching for my 30/30. I've tried receipt paper, onion skin paper (don't know what weight, came in a notebook), tissue paper, and bible paper (no idea what kind that is). The onionskin and receipt paper work the best, but they don't work well. They expand the case neck to the point where the cartridge barely chambers. The onionskin paper measures out at .0015", and I think the receipt paper is a tad bit thicker. I'm wondering whether there are any thinner papers out their that I could try without resizing the bullet (pardon, Boolit), or whether resizing is my only option. Thanks for the help. Oh, I'm using a Lee 170 FN, the Boolits come out at about .3095".