Been a couple of year and my experience was mostly limited to the mining industry, but everybody seemed to use ampho. I never saw det cord or other HE, but there seemed to always be blasting caps around.
But these guys were mostly interested in moving material.
I’m not familiar with ampho, unless you mean ANFO (ammonium nitrate/fuel oil). I don’t think a blasting cap alone will initiate ANFO. I think there are three links in the ANFO chain: blasting cap, det cord/PETN, ANFO. The blasting cap sets off the det cord then the det cord sets off the ANFO. But I am certainly no expert regarding such stuff.