(This is factory ammo, so this thread doesn't belong in handloading, no?) I have a 6" 686 who is very picky about ammo. So today I was running through everything I had .38spl and .357mag to figure what works best. (158grs are best, 124gr print about 12" at 25yds ) Anyway I got a "Pfffft" with one shot and gas shot out the side of the BACK of the cylinder. I believe it's a primer hole that doesn't go all they way through. Happens. I'll add pictures of the primer hole once I pull the bullet. BTB, S&B give me the highest Power Factor without going to a +P defensive round. +BTB, the rest of the box shot just fine.