Re: High velocity in Colts
You are right that the early Colt Woodsman can only fire Standard Velocity ammo. At some point in time Colt offered updates to allow the use of High Velocity ammo. A Colt only web page might be able to tell you what the markings Colt did on the early guns after they were retrofitted for HV use.
BUT...... Why not just use Standard Velocity in all your target guns including the Colt Woodsman from any era? It is much easier on the gun because if the gun will operate on Std Vel ammo it was sprung from the factory for it. Any ammo with more power then beats up the gun with excessive recoil. Some guns like the High Standards eventually crack frames when used extensively with Hi Vel ammo. Be nice to your 22 target guns and feed them only Std Vel ammo if they will operate on it. I have over ten different "target" 22's and ALL operate fine on CCI Std Vel ammo. It is about the most accurate ammo for the least price that you can buy and is readily available (I buy mine by the case off the internet but some local stores stock it). It is in the mid priced class at about $4 for 50 but comes package in 100 count containers.