Gentlemen,
I have a Springfield 1903 rifle in a sporter stock. Once upon a time it plainly had a side mount, which was mounted on three holes drilled into the left hand receiver wall.
The rifle shoots very well indeed with the open sights on it, but unfortunately I have decided the straight stock design does not suit open sights shooting (which is why I bought it, to shoot with open sights.)
I could restock it, but the rifle really shoots so well I am reluctant to mess with it, so now I have to scope it.

My question may be summed up thusly:
What side mount would fit into these three holes?



(Groups shot consecutively, at 50 yards on right and 100 yards on left.)

Williams SM-70 side mount?

I'm thinking probably a Griffin & Howe side mount. But it that's what fits, it'll likely cost more than the rifle...

GH

I was thinking that also Grasshopper.

Might be cheaper to have the receiver drilled and tapped for conventional top mounts...

I dunno about a G&H. The screw holes look too big, wrong spacing, etc.

Not a Griffin&Howe. They use three screw holes further apart, plus two tapered pin holes between them.