Yesterday I was shooting my prosport and I remember reading about barrel harmonics so I took the end cap off and move all 5 baffles right up to the bottom of the end cap. Took 5 shots and moved it a quarter of an inch all the way to the muzzle. Well I really took 10 shots. 5 with the sticks at the stock screws and the other 5 under where the scope starts to angle down to the 30mm tube. Well i looked at the results and 1inch from the end cap with sticks at stick screws produced the best results. It was only 3/8" frombthe factory placement of baffles but noticeably different and better grouping. Oh yeah, and cold bore first shot is dead on. Not it's usual needing 5 shots to warm up