I have an Anschutz 54 match in a Stith stock that is bedded and I am having a hard time getting it to shoot consistently. It groups really good when I hold it Juuuuuuust right, and pretty horrible if I grip it just a little different. Is this normal? It is really wierd to have a good hold on the rifle, good sight picture and a good trigger squeeze, and the shot goes 1/4" outside of the group. Help!