The HS Precision stock should have a large enough channel to result in a free-floated barrel. Once you put it on, look at how close it is. If it is close, grab a $1 bill (or any other denomination) and wrap it under the barrel. Slide it between the stock and barrel all the way to the receiver. A gentle up/down seesaw motion helps to keep the bill from tearing if it sticks. If the bill slides easily all the way to the receiver, you're free-floated. If not, put a small piece of tape on the stock where it hangs up, take it a part, and see why. We do this in the field to make sure debris isn't in there.
No insult intended here as I echo the other posters. Remember to get an INCH POUND torque wrench. Foot pounds are for lug nuts and engine heads.
When you put the screws in, alternate back and forth until each gets snug. I usually do this with the screw bit or allen wrench in hand. Then alternate back and forth a bit at a time with the torque wrench until each reaches the correct torque. If you torque one completely and then the other, one will be way too high or the stock could be out of alignment just a bit. Torque the screws for consistency......it will make all the difference in the world.