I've had sticky extraction problems with a few different brands of ammo. That's one thing about all .22s you have to experiment to find what the gun likes to shoot and shoots the best.

I've settled on CCI Standard Velocity and Mini Mags when I can get them. They all go off 100 per cent of the time. So do Federal Auto Match and I have about 20 boxes of those so they will last me a while until the price hopefully comes down.

I did use a Chamber Reamer on my 617 and it's helped me be able to use more brands of ammo without the sticky chambers but CCI and Federal group better.