The Pre 64 ones are Controlled Round Feed. The Post 64 ones are all pushfeed ( yuck ! ) . After 1996 , l believe the Control Round Feed came back for the Belgian Rifles.
I actually own a pre 64 Winchester Model 70 in .375 HH Magnum. It used to be my general use rifle until l recently purchased a MINT condition .375 HH Magnum BRNO ZKK - 602 with a 7 shot capacity.
The Pre 64 model 70 Winchester rifles are good guns , but it would be a slight exaggeration of the truth to say that they are perfect.
My Granddad used to own this rifle before me. He used it to take a Six ton Bull Elephant in Kenya in 1968 with a Shoulder shot using 300 grain Winchester " Solids " ( full metal jacket round nose bullets ) . The stock of mine has cracked and been repaired with plus minus epoxy and ( what l believe to be ) stove bolts .
Apparently , most of them would crack since they were not reinforced by crossbolts.
Also , mine needed to have the feed ramp extensively smoothed out , to feed soft point Ammunition properly with 300 grain A frames.
Also , mine shoots 3 inch groups at 100 yards.
It's still one of my favorite guns though. I took 3 of my 4 Australian Water Buffalo with mine. My favorite kill was one where l took a Water Buffalo with a broadside lung shot using a 300 grain Kynoch Round nosed full patch solid . I would always opt for the lung shot whenever l used the old Winchester for Water Buffalo , due to the gun's large grouping and the fact that the lungs made a HUGE target.