I have a .357 SIG barrel for my Glock 20. Out of 10mm, .40 S&W and .357 SIG, the .357 is the most accurate. I cannot directly compare the "snappiniess" as I didn't do that. I also only have 50 down the barrel. I liked it a lot though and plan to shoot more. I have supplies to reload it because it is so expensive off the shelf. If I had a P226, I would get a conversion for .357 SIG. For me it's just fun to have another calibre to try. Also, as far as the accuracy goes, I need more time and care to absolutely declare it the winner. That was my first impression though.