I arrived in camp one day about forty years ago, and found the 165 gr ballistic tips were seated a few 1/1000s long for the bolt to close on my 30-06. Out of 100 rounds I managed to seat the bullet a little deeper on about 20, and killed a deer with one shot the next day.
But aftet that every round got cycled through the rifle before leaving home.
I always fired a couple fouling shots at home or along the road before arriving at camp.
That old 670 really tossed the first shot from a clean bore. By the third she settled into head shooting grouse to 80 yards mode.