Hold on now ya all, Remember I can fire 135 Hydra Shock and have no problems. 124 Gr is good too. I've been told the gun was designed around the 115 and 124 grain.. both work just fine. However, my gun likes the 115 gr better. Yours might like the 124 and 115, I don't know.... If it works ok use it. Guns are like people, Ya gotta test them to see how they work. Just kidding. Don't mean to tell anyone what they should use in their pup. That was not the intent of the test. I was testing to see what worked in my pup and what didn't. I know what won't work very well, and now I know what will work very well. Sorry if I steered ya wrong.