Jeffrey, yes Sir. Most manufacturers including SIG make firearm packages that have 10rd magazines so their pistols can also be sold in states that have magazine capacity restrictions. The pistols are exactly the same but just have 10rd mags included. The pistols will also accept any standard capacity magazines just fine.

Most definitely can. As long as the magazine is for the correct Sig then it will work whether its a restricted mag, standard mag or high capacity mag. No problem for it.