I load the Hornady 1/2 jacket 100gr bullets REALLY fast. I do not stack them in the tube magazine. I use IMR4895 underneath this bullet and I don't have a chronograph, but I get lead contrails when shooting. I would guess I am around 2900-3000fps with it... It is significantly faster to target at 100 yards than a 170gr pushed by the same powder (but lesser charge). The sound report on impact is quite a bit slower behind the gun's report with the 170's over the 100's, and the 170's are doing about 2100fps.
Only popped a rabbit with one thus far, at about 30 yards. It was...explosive. Accuracy isn't great out past about 50 yards.
I have some of the Sierra 110gr varminter hollowpoints you are talking about, but haven't done any shooting with them yet. I loaded these with IMR4895 also. I might actually make it to the rifle range one of these days to really try them out. They should go a bit slower, probably about 2700fps or so, and the better jacket on them should keep them together better so they don't leave lead contrails.