10/22 and 77/22 magazines

[ajstrider]

What exactly is the difference between the Ruger 77/22 and 10/22 magazines?

[Blitzer]

Marketing? ;)

Actually the way the magazines fit the bolt's underside are very different, with the 77/22 allowing the bolt to turn. So the clearances are going to be totally different comparing the two.

Perhaps the 77/22 will function in the 10/22 or visa versa?

Found it!

From the 77/22 manual;

NOTE: The Ruger 10/22 magazine (BX-1) will fit in the model 77/22 rifle, but the
bottom section of the 10/22 magazine will not be flush with the trigger guard
assembly of the 77/22. The 9 shot Ruger 77/22 Magnum and .17 HMR magazine is
not interchangeable with any other magazine, nor is the 6 shot 77/22 Hornet
magazine. The .44 magnum magazines for the Ruger 96/44 lever action rifle and the
Deerfield Carbine rifle will not fit into the Ruger 77/44 bolt action rifle due to
dimensional differences. Do not attempt to use either of them in the Ruger 77/44.