The combination of low rings and that huge f'n windage knob on the SS cause ejection issues on a lot of actions.... not just the Tikka.
You could move stuff around.... or, grab a six-pack and watch 'Sniper'. Pay attention to Tom Berringer and how he catches the brass as he opens the action. It's a simple solution... you get half drunk.... and you get to watch Billy Zane shoot a dude from a moving helicopter with a Bassoon.
I had the same issue with my CTR and the SS 3-15 in Seekins lows. I have since swapped it for the Bushy LRHS, problem solved. I'd like to put the SS back on the CTR if I could make it work (without the Berringer trick I mean), any chance going to mediums (.97 vs. .82" on the lows) would solve this issue you think? I don't have any on hand but might order a set if it's likely to work.
