NOS, is this possible

No expert what so ever,but I've asked that question a number of times of people far more familiar with NOS,and with Cast Pistons I was told I could handle a 75 HP Shot without worry !!!But they wouldn't be comfortable going any higher !! That stuff (NOS) scares me for some reason !! Maybe it's the KABOOM Theory ??? Although,now that I have plenty of beef down under,hmmmmm !!!