I had recently picked up a Glock 20 10mm because I was intrigued with the caliber. Still trying to get used to the trigger after being spoiled by 1911's for close to 40 years. That Sig is a VERY nice handgun!
I have shot deer and pigs with various 10mms and my favorite load is a the Double Tap 200 gr hardcast lead bullet. It shoots well out of the Glocks, S&W 610 and my Clements GP-100. Hopefully the Sig will like it too. This round is great at breaking shoulders. I used it in a S&W 610 with a 5 inch barrel on a Texas heart shot on a wounded deer at about 50 yards and it went in the back of the right ham and came out in front of the left shoulder. You can't ask for better performance than that. I have recently been trying the Underwood ammo with a 200 gr hardcast bullet and so far it looks promising too.
For everyday carry the mags will be stuffed with 175 gr Winchester Silvertips