i also tried sighting in using only 100 gr(2 fifty gr pellets) but could not group well through my rifle. our ML season is only 2 weekends, so i am not wanting to go all out and get scientific with it. with that being said, shooting loose powder is out of the question. all i'm looking for is an accurate bullet that will maintain most of it's integrity in front of 150 grains (3 pellets).