I didn't cure it. After trying every modification I could, including different loads, bedding, scopes, etc., I finally decided the barrel had not been stress-relieved correctly--or perhaps not at all, because the manufacturer assumed heavy button-rifled barrels do not require heat-treating.
It would put at least 3 and often 5 shots in 1/2", but when shooting any more before allowing it to cool, they started heading left and high. So I sold the thing.
