The following is not meant to be argumentative.

It is not a great feat to keep 4 shots in 3 inches at 100yds with open sights, given an accurate rifle with good ammo.

I have seen it with some regularity. I assume you were talking about shooting from a bench or other rest. I am not only talking about doubles (few of them around here), but am including single barrel rifles because the use of one barrel only was mentioned.

If a Garand or M1A won't do that well, something is wrong. Many will do a good bit better.

You are right that many people may not be able to do it. Many are only once a year "shooters". They drag out the deer rifle the day before season opens if they bother doing that. (They really can't be called shooters.)

I have seen far too many that could not keep a 5 inch group at 100yds, off a bench, with a scoped bolt gun.

Douglas R. Mays