I didn't realize that until I went to the range with them both last week.
I have been thinking about this for the last week. All I can think of is that back in the early 80s I used to go shooting with a friend in South Carolina and at the end of each shooting session we would go back to his...
I recently picked up a Mark I with a 6 7/8" barrel. I checked the serial number on the Ruger site and it states it was made in 1965. Then since I was on the site I decided to see what year my Mark I with the 5 1/2" Bull-barrel was made. According to the site it was made in 1978, serial #...
I have had three No.1 rifles (RSI to 35 Rem., K1-B to 35 Rem. and 1-H to 454 Casull) re-barreled by McGowens Precision Barrels. All look great and shoot great. They weren't cheap and had about a year turnaround.
I had the barrels contoured to the Ruger specs so I could use the same wood.
Have you considered just having it re-barreled? It might be easier to find someone to re-barrel it instead of re-boring and rifling the existing barrel.
When the eyes get old you do what you have to do if you want to keep hunting/shooting. I deer hunted for years with a Remington Model 8 35 Rem. with a peep sight. Then the eyes said no more. I didn't want to "bastardize" it with a side mount.
This is my Marlin 1894 41 Mag with an old Leupold...