I don't shoot F Class, but I have had one of the choate stocks. I had the choate tactical on a savage 10 308. In my opinion, it was decent for the money. The use an aluminum "v" bedding block that extends down the fore end (IIRC), are fairly heavy, and have a large palm swell on the grip. The bipod was attached onto a dovetail rail attachment, which can work loose at times. The barrel channel was wide enough to free float a telephone pole. If I am not mistaken, several people who use this stock also use a kydex adjustable comb. I did not dislike the stock at all, but upgraded to a xlr chassis.