So today I shot the Howler slugs from Daystate , First time out with them and I must say ... Watch the Vid . The Howler slug is a 20.3 grain Slug made by NSA and yes he has done a great job . The Howler slug makes sense for the Hunter wanting quality slugs , Accurate and certainly does the job . My Daystate ART barrel loved them . Seems they work in lots of barrels we tested today . These Howler slugs work and work well !