Direct from Ruger.
http://shopruger.com/10_22-BX-25-Magazine/productinfo/90361/
Do they work well? I've got one in my closet that's going to collect dust until I buy a 10/22 or until I can quadruple my money on it!
I think you lost your window of opportunity. I'll shoot mine tomorrow and let you all know. I'll feed it different ammo brands too. I've heard they work flawlessly.
Well, three of the four did not cycle through all 25 rounds.
The one that didn't fail had CCI Standard Velocity.
The failures had CCI Standard velocity, Winchester T22 and Remington 22 Thunderbolt.