I have this product in use on two different rifles, it works just as well on the .223 caliber as well as the .308. No hearing protection is required when using this, recoil is as mild or even more so as it would be while using a side port brake, and Point of Impact is only affected slightly if the barrel is properly bedded. While the cost may seem high, this addition will make your day at the range about 10 times more enjoyable than it will be listening to muzzle noise for several hours. Truly hearing safe, in fact people are simply amazed when they find out how quiet these are in the real world. I plan to purchase several more products from Yankee Hill as the overall build and design seems equal to or superior to products costing hundreds or thousands more.