Was looking at a new gun was going to get the gracoil on it be mostly for doubles over heard some other shooters saying they don't like it on a doubles gun does anyone know why or what kind of issue there would be
Some shooters set the really soft which is fine for the singles targets but they have a response/reset issue for doubles. Ultimately if you are going to have one on your shotgun you have to find the right setting for singles and doubles and make it work. All in All not a bad unit.
All recoil devices move backward and then forward again to absorb the recoil. The problem with is your stock can move around on your face. When the stock is at its most rearward position, your face can be left hanging in the air? So to speak. This really depends on the slope of your stock. As the stock moves rearward the stock itself lowers on a shooters face. A parallel stock is the most desired stock to have for a recoil system. As this is not a factor with this type of stock. Another feature some devices have is they build the top adj. comb into the butt plate. So the stock can go backward while the face never feels the stock moving back and forth. This allows better follow up shoots. Since the face is on the comb, that is connected to the rear butt plate on your shoulder. This is a nice up-grade feature. But sometimes this can pinch the shooters face while shooting if his cheek gets caught between the stock and the comb when there is a lot of movement. The Stock Lock system has all the movement behind the grip. So the shooter does not feel any movement of the recoil system on his/her face and there is no pinching problems with the cheek as well.
Spring type systems can make a very odd sound (like a boong!) when they release and move forward. An air type device and a oil type device can both leak over time but have no sounds. The PFS unit works on memory steel washers. Which work great. They never leak and make very little noise while working. So as you can see, there are plus's and minus's in every recoil unit made out there. The trick is too find one you like in your price range that works best for you. Some are a few hundred bucks, while some others are a few thousand bucks. With others in-between. Many shooters have to use more than one to find what works best for them. This can get expensive. So many shooters end up using a lighter load instead. Now go out there and find your balance. Good Luck and don't forget to break em all jeff
The problem with Gracoil units is a matter of physics.
Their unit is a spring only devise and springs DONOT absorb energy, they only store it. So, after the first shot the spring is compressed but then that force rebounds and is pushing the gun forward which makes it quite difficult to control the gun for two quick shots. This is why cars incorporate shock absorbers with the springs to control rebound.
A better and proven unit would be like the Isis recoil unit. This unit incorporates springs and a hydraulic shock absorber
which controls the movement both back and forth by converting (absorbing) the energy to heat within the shock absorber. Also if gun balance is important to you the Isis does not add any weight to the rear of the gun like many other units do.