I recently came by a new Glock 33 .357 SIG. Although I have a G26 and G19 I am not a Glock fan but I couldn't pass up the G33 for $350 (FTF sale). The .357 Sig is an impressive round. Powerful and very accurate. I immediately ordered 2,000 once fired SIG brass and reloading dies. By using a 40 S&W carbide sizing die first up in my Dillon reloading press, the .357 SIG is no more trouble than reloading any other pistol round. I had 2,000 9mm 115 gr flat nose Berry's bullets and a keg of AA#9 on hand, so I've been loading and shooting these, reduced a couple grains of powder, for a target load. I think I'll order another 2,000 cases and try out a couple thousand 124 gr Berry's bullets. Store bought practice ammo is higher than 9mm, 45ACP, etc, but defense ammo seems to cost about the same as the other calibers. Like $17.95 for Hornady 147 XTP, at the gun show. I don't see the need to replace most any caliber with the .357 SIG but, IMO, the round is up to doing what most any other defense caliber will do and maybe better.