Recently bought a beautiful 1917 Eddystone. Don't know how original it all is and don't really care but all Eddystone in excellent condition and I really like it. However a buddy and I went out doing some shooting and when first started shooting this rifle at 100 yds. weren't even hitting the paper. Looked like one round may have clipped the top of the target. Tried aiming at the bottom of the target and found that it groups pretty well but a flat 12" high. Looks like the front sight blade is newer than the other parts. Any ideas? Are there other front sight blades that will fit this rifle that maybe previously someone put the wrong one on it. Any help would be appreciated.