I currently own a Sig P229 chambered fort he .357 SIG. I chose this firearm after about 2 years of pretty solid research on the caliber. During that time about the only bad thing I could find about the round was that it seemed to be more prone to bullet set back due to re-chambering the round repeatedly then most other calibers. I do understand FULLY why this round is more prone to this issue. My question to yall is currentlly I am carrying the Speer GD 125 gr round for this platform and I have experianced bullet set back twice in about a months time. Both rounds that have set back are from the same lot number in fact they came out of the same box. Is this a common issues to Speers load or did I just get a bad box? If this is a common issue would i be better off going to say the Double Tap Ammunition loading that the store I work in now carries or should I look at say the Cor-Bon. Basically i just would like to know if I can still expect this from the Speer ammo or if I did in fact just get a bad box. Any input in to this topic would be very welcomed.