Theres no real set range, it depends on too much. Someone shoving 15bb UTG is not shoving the same range as 15bb OTB thus our calling range changes. My calling range does not change when regarding our stack size but only the effective stack size which in this case would be 15bbs, unless we will be commited by players behind us for our entire stack if thats the case then I would work out the required equity for our whole stack (30bb?) oppose to just the 15bb shoving stack. Would highly reccomend checking out sngwiz to understand calling/shoving ranges better.