Your sights were graduated for the old "M2" spec GI ammunition, which put a 150 fmj 'flat base' bullet down the bore with likely 4895 powder to give 'about' 2650-2700 fps. Commercial ammunition, even the load you shot, are loaded to quite a bit higher pressure. There are a LOT of guys, and even the old Ordnance Dept., who figure that the 'low serial number/high pressure ammunition is NOT a good combination.Against sound advice I decided to take the 03 out between rain storms and fired some Federal 150 gr ammo through it. Enclosed are pics of a steel target at 100 meters after 10 rounds most were center hits. The 03 also hit consistently at 200 meters I was a bit surprised the old Warrior can still shoot. Also enclosed is a pic of the spent cases the primers all show good center firing pin hits and no unusual problems on the brass.
I've not shopped for an 03 for quite awhile, I trust that Rick the Librarian is on with his estimation that you got a good, average price, but from what I see, you've got a rifle that's worth a LOT more if you consider the sum of the parts instead of the assembled rifle. Single bolt stocks are worth probably half of what you gave for the rifle to a collector who desperately needs one to finish up his otherwise 'correct' early rifle! (I sold one approximately ten years ago for $400+, and the buyer thought he was stealing it! Who was I to argue?)