so today on the range i had my trusty savage 10 chambered in 243 win with a shilen 26 inch stainless (varmint contour) I shot 10 rounds at 200 rang steel with all 10. then moved to the 300 yard target ran 10 with all 10 hits then off to the 400 target now i ran 6 rounds with hits and the next 4 i missed with no call on where they landed. so without hesitation i switch rifles and slam the gong as im upset now. i waited 10 mins or so fired another 5 shots and missed them all with the 243 again

all this took place in about 2 hours and the temperature was about 75 degrees. so is this a case of point of impact shift due to heat? i have never had this issue but i also normally dont use my 243 for long strings either