Yeah, those 22 SX bullets are great if they don't blow up going out the barrel. But I've found there pretty good up above 3000 and more. That's what killed the 220 was the throat erosion.
I even use SX bullets in my 1922 Savage 99. 125gr going out at about 2700fps. Great out to about 150 yds for deer. I hit one in the head Christmas day, I never saw anything go down so fast. I saw it in the garden as I was about to shower when I got up, grabbed the 99 and stepped out the front door and it was a goner.