Quote Originally Posted by DesG View Post
Also be aware, as I've just been reminded, of the phenomina of flashover. I've never seen it or even met anyone who's seen it, but apparently it does exist. If a light charge is distributed along a large case and the primer flash ignites the whole lot at once, rather than passing the fire from grain to grain, it can build up a huge pressure peak and blow up the gun. In Rifle cases people often use kapok or tissue on top of a light charge to prevent this.
I've always considered this an "urban myth".... you said yourself, you, or anyone else you know, has never seen it... and all those of us who used to shoot 2.7 gns of BE back in the day never had a problem with it....