Thanks for the great report and congratulations on your success.
I'm restricted here in IL, in the January handgun season to cartridges less than 1.4" case length. The Whisper is legal, as is my 30 Bellm.
I plan to hunt my Encore 30 Bellm this year, but have been unhappy with the accuracy so far. I just picked up a used Contender 10" Whisper barrel and just sent it off to Virgin Valley for installation of their six screw scope base. I bought 2 boxes of Cor Bon ammo with the 150 gr. bullet. I chrono'd it at 1820 fps and shot a 1 3/8" three group, with open sights, at 60 yds. Some quick handloads I put together with Remington 125 gr. bullets and 296 powder were not so accurate, but went 2100 fps. My barrel has a 1-8" twist.
I'll be mounting a Burris 2-7X when the Whisper returns, the same scope as on the 30 Bellm. One of these barrels will be my primary Illinois deer gun. The runner up will be seen in the classifieds.
Any idea how fast your load with the 130 hornady is going?
Greg