I recently tried Titegroup for my .357 and had an interesting occurence. I loaded up 100 rounds of 158 gr LSWC with 4.9 gr of Titegroup, OAL 1.61 and starline brass on my SDB. Hornady lists 5 gr as maximum for this setup but the pressure stated is very low at about 23000cpu. At the range the new load shoots great with little felt recoil and is very accurate and consistant. On my last twenty rounds I am shooting fast doubles when on round 6 I get a boom with about twice the recoil. The cylinder is stuck fast and the primer has backed out of the case. Once I get the gun open its plain to see that round was way overpressure. Luckily no damage to the gun. Since I am using a SDB with its indexing shell plate I can't figure out what happened. I don't see how I double charged it (although I'll concede anything is possible). Is it possible I experienced a detonation? Frankly, I'm skeptical about the concept but I am curious if anyone else has seen something similar. Needless to say, I went back to my old but dirty standby for lead; Unique.