Yes they work. I bought the gun with the Hoehn tuner on the front, and the mid barrel tuner has been a recent addition. Your looking at around $250-300 for the front one and about $100 for the mid barrel one. IMHO you need both to be real competitve (not that I am or anything
). The front one has 500 clicks, each click moves an adjustable weight .001 up the barrel, while the mid barrel one just is moved using a ruler to measure your distance away from the forend.
I didn't install the front one, but from what I can see, and from what I have heard, they are not very hard to install. The mid barrel tuner is very easy to install. All you have to do is loosen and tighten allen screws to move it up or down the barrel.
The tuners are most effective on barrels 26". The front one works by controlling the vibtrations, making them consistant, and the midd barrel one works by dampning the vibrations. I probably saw a 10% increase in group size.
gth, the cheapest ammo I have tried in it is Lapua superclub. The most expensive, of course, Eley tenex ultimate eps. I have never tried bulk ammo in it, nor will I do in the future.
