HEY, I just spent two years getting a 10 gauge Parker EH Grade rebuilt into the perfect clay target gun by Dewey and Craig. NO WAY we are going to change the rules about that now !!! The rules have always been that ANY PARKER or ANY LCS that was originally available in ANY gauge could be used in the LCS vs PARKER Challenge Cup. AND our good friends at RST have gone way out of their way to make 10 gauge 1 and 1/4 ounce loads available to us all. AND before 1895 or so the 10 gauge PARKER was the most popular PARKER in the line up. Good Shooting To You All, Jent