I have finally got the .410 barrel to shoot worth a darn! It's a VersaPak. The .22lr barrel has always been ok but the .410 always shot very high (even though it has the tallest bead I've ever seen on a shotgun) and the pattern was the worst I've ever seen. I looked down the barrel and saw massive amounts of tooling marks. I've been honing the bore being carefull not to over do it in the chamber and choke. I've used a 3/8" hardwood dowel slit on one end with various grades of steel wool positioned in the slit. Chuck the other end in a drill and use lot's of oil. I'd hone some and then clean the barrel and head to the range. After a year of tinkering with this SOB I've finally got the POI down and excellent patterns. Even with 3" shells. Also shoots slugs fairly well now. The entire bore is mirror smooth now. Now my new problem- I never noticed it until yesterday but it may of been there all along. When the action is opened the .410 barrel has a little side to side slop in it. Not a large amount of slop but there is some. It locks up solid, just a little slop when open. The .22 barrel is fine when open and closed. I know someone with both a 20 and 12 gauge from the late 70's and both are sloppy when opened but lockup is solid and he shoots the snot out of them. Do I worry about it and try to shim it or shoot it until the lockup gets loose?