I know the correct awnser is call SIG :
SIGARMS Customer Service Department:
Phone: (603) 772-2302 (press #3 for Customer Service)
Fax: (603) 772-4795
Hours:
Monday thru Friday 8:30am to 6:00pm EST.
US Mail:
S.A.I.
Customer Service Dept.
18 Industrial Drive
Exeter, NH 03833-4557
But i am almost 100% on the CORBON+P ammo being all good. As a matter of fact I think it will probably end up being one of the most accurate rounds.
Tex