Any on have any experience with the Smokeless powder shop in Austin Tx? They're new for me and since they say they have the IMR7977 I've been looking for locally here in Oklahoma for over a year, honestly their $250.00 min is kinda spooky. I've heard mostly good to great about this powder and since it's for my 700psI'd really like to try it compared to the 4350 I've been using forever in this rifle. Thx in advance.