The main reason I keep reloading them is that I control everything about what goes into the shell.
Back when I shot Factory Hevi 13 shells, they changed wads and components several times. You would have a shell that patterned great and the next box would shoot like crap. I found the wads from the 2 shells and they were nothing alike.
I ask Hevi about it at the NWTF show and they said they did not change anything until I showed them the two different wads, at that point they would not say anything else.
That is when I started rolling my own
