I have both and use them of Red Fox and the European brown rabbit we have downunder.
For Fox`s I was using using the 17 with 20 V-Max at 4000fps and was getting a bit of Splashing so next winter I will be moving up to the 25 V-Max.
Wirth the 20 vartarg I use 32 gr V-Max at around 3750 fps.
My...