I just read a fantastic article on Sig at http://www.remtek.com/arms/sig/model/229/229.htm and it left me confused on something. It explains that Sig had to go machined stainless in the P229 because the added energy of the .40SW cracked the previously used sheet metal slides. Then how do they get away with the .357 SIG in the P226? I keep hearing about the explosive power of this cartridge. Is it really milder on the gun than the .40 SW?