surely not all of them. As a matter of fact it seems to almost go by the caliber. Ive had good luck with 243, 250, 2506, and 280s. Pour luck with the 257 roberts, 7 mags, 338 mags and have heard horor storys about the 757. 06s and 270s and 300 win mags seem to be hit and miss. Two of the most accurate ive owned were a 280 and a 2506., Both i foolishly let go. If i could have one guy back of all the rifles ive sold through the years it would be that 280