I shoot the rottweiller 2 3/4 inch mags. The only reason I haven't tried the KO's is because I shoot the the 2 3/4 mags and I won't shoot anything else. 15 years shooting these slugs and I love them.

From what I was told they don't se the same powder in them as the do the mags. It's different. I had the brenneke web site at one time and can't find it in my favorites. Try doing a google search. It had all the ballistics on the site.