never used TSS but I know it is expensive I have killed 2 with a .54 smooth rifle and am using a .62 trade gun this year. look on here for skychief load it will help also the old saying less powder more lead. good luck.
:( I feel your pain have had dogs all my life they have all been family members. I fear that I also am on my last one being old sucks no matter if your man or dog.
Took my .62 trade gun out yesterday and tried different loads. I found that using The Skychief load with bare chewed ball at about 50 yds.
leaning against a tree had to consecutive shots touching. can't go wrong with a smoothbore