I once picked up a 1947 M70sporter in 270, it had a Griffon and Howe mount and a Lyman Alaskan 4X scope. Danged thing shot really well, three shot groups less than 3/4" were normal. However because the stocks on those old M70's kick me like a mule I moved it over to a friend for something else. I also have a log book of my father's that he used when he worked for a large Canadian ammo company. In it are some test results of bullets he was testing in a .220 Swift M70 in 1954 or so.
The only mods to the rifle were a couple of pie plate shims under the action. Scope was a l 15X Lyman Super Targetspot (( which I happen too have !) Danged rifle was capable of shooting 5 shot groups into 1/2" with some of the bullet and powder combinations! Of course there were some that were 1.5" and larger as well! LOL Cat
