Maybe I worded it wrong the first time! The situation that I am dealing with is, when I shoot my gun cold it groups at like 3 in.. The warmer that it gets the better it starts to shoot. I remember at one time someone was talking about preload on the barrel. Was woundering if anyone knows this guy or has any info that would be helpful in this situation. When the barrel gets hot it shoots .5 to .75 groups (sometimes smaller) . I just dont like having to shoot that many pounds before it starts shooting good. Any input would be appericated.