One thing to be aware of is not to dry fire these. The firing pin can scuff the edge of the chamber; which will cause extraction problems.
I had this issue when I first bought my Lithgowmade .22 trainer. It was easily fixed; but frustrating when your on the firing line and it's leaving the case in the chamber!
How about a range report?
Also test various makes of ammo; because it seems that these rifles often have individual preferences.
We have some family in Portland, Oregon.