Oregon has had a bill introduced which requires a sheriff issued permit to purchase, 5 round mag limits, AND limits ammunition purchases to 20 rounds per month.
https://olis.leg.state.or.us/liz/20...urce=facebook&hss_channel=fbp-225612270801893
https://olis.leg.state.or.us/liz/20...urce=facebook&hss_channel=fbp-225612270801893