I shot about 20 rounds yesterday using the Bore Buttons. I didn' t compare with/without, but was pleased with the results with. I was using 90 grains of Triple 7 pushing a 385gr Maxi, and had 1" groups at 25yrds, 3" at 50, and 6" at 85. I feel the most limiting factor in group size was the shooter' s ability to center a William' s Peep on the bullseye. That front bead blocks out the center of the target past about 65yrds, so the best I can do is shoot for the center of the target. I will say the felt recoil was quite a bit stronger with vs without bore buttons. I guess I was losing pressure around the maxi because the first shot was painful. By the time I got to number 20, I was pretty numb to the recoil. It ain' t numb today though.[] Just for good measure, I loaded a 405gr Powerbelt with the same powder charge. I centered a beer can at 30yrds, so I should be good with elk for either projectile. Maxi' s are MUCH cheaper though, and I' ve still got 40 more.