Will this myth never die? S.E.E. has only ever been (possibly) replicated in artillery ammunition. No one has ever been able to replicate "detonation" in small arms ammunition. In every well-investigated, documented case in which someone suspected that detonation caused a "kaboom," other causes have been found. Usually, it is either the wrong powder, like 40 grains of Bullseye in a .30-06, double or triple charges, or a bore obstruction. Here's the problem: A given charge of a given powder possesses a finite amount of energy. It takes a given amount of energy to rupture a barrel or cylinder. An undercharge of a powder that is otherwise an appropriate powder for the given cartridge simply does not have suffucient stored chemical energy to cause such a rupture, regardless of how fast it burns. And it does burn, not detonate. Other than the questionable artillery study, no one has ever gotten smokeless powder to detonate. Always investigate user error first!