Thanks for responding Matti and Gippeto (I'm not sure how to tag you here). I think I can answer your questions by providing a few more details. The company (startup) I work for produces a thin film for windshields and part of my job is to test its ability to stop windshield breakage from stone impa...

I work in a materials testing lab that currently uses a calibrated slingshot for firing steel BBs. The slingshot frequently needs to be recalibrated since the elastic stiffens over time, and we'd like to overcome this issue by using a pressurized gas system. We need to fire 3/8" steel bbs for our te...