Best money invested was my Delorme P-40 GPS. Can't say enough about it's mapping capabilities.
Worst money thrown away was a bino/camera combo. It was a while ago and don't remember the make but it had about a .5 MP camera that had no stabilization along with poor quality pics that made it useless.
Anyone who shoots a sabot bullet has had the problem with loading the next round with a dirty barrel we have all struggled with it.
Between muzzleloader shots I have done some research and testing on my own to find out what works for me for the next shot. I have been using a product called bore butter and when the muzzleloader is just sitting around I leave it caked in the barrel for protection. Have also found that if I lube my sabots with bore butter they really slide nicely down the barrel....