went thru this with lil bro's flinter...thicker patch first shot....then regular load after that if needed,,.........
regular 70gr, 490rb .020 greased patch
first load.. 70 gr, 490rb .030 (demin)greased
I found that flannel makes an exceptable patch. While not the best and it does tend to shread a little it has more cusion making it easier to load and I got exceptable accuracy.