I keep coming up with more questions about reloading the 357 Sig. I thought it would be nice to have one thread that could catch all the tips, tricks, questions, and answers concerning reloading for this caliber. First, it is my understand that if you use a carbide 40 S&W full length sizing die before running the 357 Sig brass through the steel 357 Sig die that it removes the need for lubing the cases. Am I understanding this correctly? Second, there is some debate on headspace for the 357 Sig. I plan on headspacing from the shoulder and using the L.E. Wilson headspace gauge to make sure the rounds will chamber. I contacted L.E. Wilson, and they told me their gauge does indeed measure headspace from the shoulder. In addition, the gauge can be used for OAL as well. I have also watched a video on YouTube from a guy that uses the Hornady tool. Another concern is choosing a powder. I was originally concerned with finding a low flash powder, and started a thread on the Cast Boolits forum about Vihtavuori powders with this in mind http://castboolits.gunloads.com/showthread.php?t=168711. I still plan on trying these powders, but I think it might make more sense to try to duplicate the defensive round that will be carried in the weapon. To this end I contacted Hornady regarding Hornady Custom Ammunition 124 Grain XTP JHP #9130. To closely duplicate the round it was suggested that I should use the 124 grain XTP JHP #35571 bullet along with Winchester Action Pistol powder. The Hornady ammo has a nominal velocity of 1350 fps. The Hornady Handbook of Cartidge Reloading 8th Edition suggests 9.3 grains of Win Act Pist to reach this velocity. Next I contacted Speer regarding Speer Gold Dot Ammunition 125 Grain JHP #23918. This ammo uses Speer Gold Dot bullets 125 Grain Bonded JHP #4360, and has a nominal velocity of 1375 fps. The Speer Reloading Manual #14 lists four powders that will reach that velocity: AA No. 7, AA No. 9, Blue Dot, and Viht N105. The Speer CSR indicated that his choice would be AA No. 9. I started a thread about 357 Sig brass life, but did not get much feedback. A guy on the Cast Boolits forum was loosing as many as half of his new brass by the fourth loading, but he did not indicate his load. I hope to do better than that, but if I am mirroring the above defense rounds I am skeptical. Finally, I noticed that the Redding G-RX Carbide Base Sizing Die Kit #96150 is not only for 40 S&W, but also 357 Sig and 10mm. I plan on firing my 357 Sig loads from a Gen 4 Glock 31. Is bulging even an issue with this caliber/gun combination? So what can you add about loading for this round? What questions do you have that others might answer? Wanna kill these ads? We can help!