[82Rigger]

Mike,

The M1 Carbine was not suitable for any serious target work.
It's maximum effective range was 300 yards, and even that is pushing the envelope quite a bit.

The cartridge specifications are basically that of a pistol cartridge...short range.

The M1 Carbine, while lightweight and conveniently small, is "combat accurate" but it's design is not conductive to accurizing for target work.

A typical G.I. M1 Carbine will shoot a 3 inch to 4 inch group at 100 yards. Because of the way the barrell and receiver fit into the stock, that can't be improved on very much.

A typical issue grade M1 Garand also shoots 3 to 4 inch groups but can be "accurized" to shoot much better.It is possible to get groups as small as one inch at 100 yards from a Match grade M1 Garand.