the 40x is a short action single shot . i would think they would shoot better than a sendero. me and my friends own 17 senderos. they all shoot good. some shoot real good. the 40x costs almost twice as much(1000 vs 1900) at last glance. and you have to wait . the 40x has an external adj trigger. not a plus for me . and you can have jewel trigger for 225 or so. it would be an interesting comparison. do you have a sendero in 7mm?