I tested some but was too scared to load them with Clays so I used what I had on hand at the time (700X, Longshot and HS-6); the 700X was way over pressurized so it was downright nasty and the other two gave a pretty stout impulse. Now that I have some 10mm mags for my Tanfo I might try again loading over 1.2" with Clays, TG and Bullseye.