Production List of Approved Pistols - IPSC vs USPSA

I want to get into competitive shooting. There's a local club in my area that hosts a USPSA Level 1 match regularly.

I currently own an HK P2000SK. This gun is not on the official USPSA production list, but I do see it on the official IPSC production list. Seeing as how USPSA falls under IPSC, will I still be allowed to compete?

I tried emailing the club, but it's been almost a week and they haven't gotten back to me yet.