Some rifles need a little pressure by design on the barrel under the forearm. It dampens the harmonics and helps them group better. You can always try grouping it without a pressure point and add it back later if necessary.
If you're putting a pressure point on your barrel don't you want it at the very end of the forearm? I put a few pieces of cork under the barrel at the end of the forearm on my Mosin Nagant. My Stevens 200 has a synthetic stock and that's fully free floated.
most thin barrels need fore-end pressure at the end of the stock to shoot their best,but..... not all barrels. You will have to experiment with it to see. Being synthetic or wood makes no difference as far as free floating the barrel is concerned.