Kurt, the Whisper is an outstanding round. I shoot 125gr Nosler Balistic Tips over H110 powder. I run mine near max in my 10" Contender and it groups wonderful. My twist is 1 in 10" so the subs do not work.
I was able to take 2 deer this season with this combo, the Whisper is perfect for whitetail....... A friend just ordered a fast twist, 12" from Mr. Jones yesterday after seeing how it puts down deer first hand.... He was a loyal 44Mag man.
Do you know what twist your is?
If you get into reloading, the Whisper just gets better.......
Have fun and keep us posted! jh