I purchased a 1964 Remington 700 30/06 20" barrel in good shape. Unable to leave well enough alone I installed M-16 extractor, Trigger Teck all weather trigger and had the rifle glass bedded. Bought some expensive Sako Super Hammerhead 180 grain and went to the range. Best groups were 2 inches. Next day I tried again using inexpensive Winchester Power Point 180 grain. First group was 5/8". Made my adjustment and second group was 1". Also when digging out bullets from heavy gravel backstop the Sakos had all lost their core, should not happen with a bonded bullet. The Winchester's were mangled but intact. Go figure.