I dont know where you heard that the stw is finicky but with the one i have dealt with is is just plain all around fun. As easy as anything else to load for if not easier than some of the calibers I've played with. We have a original sendero that is chambered in the stw and I personally wouldnt want to be through the cross hairs out to 800yrds. It would be further just I havent had time to play with it any further. Definately a .75moa gun out to 800 at least. No trigger work, no bedding, no special brass prep. Just load and squeeze the trigger and watch stuff flop down the hillside.
I dont know who ever came up with the imaganary word of "Over Gunned"