Did wearear protectors, but wow, more echo than I had expected -- first time shooting through tube. I guess the other thing I thought about that I didn't write were the conditions of the shoot. I shot the 10 shots over about 40 minutes time. Cleaned the barrel after 3, 3, and 2 shots. However, it was a 90+ degree day. Ultimately, I'm not looking to win any contests, just get sighted in well enough to consistently group in that kill zone of 12" or so. Will try some other slugs soon.