I just took out a crow with my Winchester Heavy Varmint Model 70 .223 with 40 gr. HORNADY V Max.
It is not controlled round feed but I took a chance anyhow.
whelennut
I am as much a CRF nut as anyone, but even I do not consider that feature to be important on a varmint rifle. Even though one of my poodleshooters is (CRF). A Mauser based rifle in 220 Swift.
I hear nothing but good reports about the accuracy of those push feed Winchesters. Sounds like your rifles bears that up! A kill on a crow, not much meat there to hit, with any rifle is a feat worthy of comment. Good shooting there.