TSS is 100% the ticket in the small bores. You must be paying a lot for your shot trash2. I want to say the last time I figured up the cost per shell excluding the time to reload them it was around $6-$7/load.
I think I'm going to the 28ga this year.
Not really, just adding up all the costs for me. $45/lb, 1 5/8/ shell is around $5 plus about $300 in reloading material (figure 100 shells so $3/per) comes to $8. If I reloaded other shells etc my cost would come down but I consider this sunk costs. But yes if I just bought the shot and used someone's reloading equip and components, I'd be right at $5ish