The black checkered synthetic forend on my 260 Rem fits a little looser than I like so I decided to put a spacer on it so it can be shimmed with aluminum metal repair tape to fit better as needed. I removed the built in spacer on the belt sander using a machinists square on the tool rest to keep the face true, alternately sanding and test fitting until it was just snug on the rifle. The I contoured the back edge to match the spacer shape, put a bit of 380 Loctite on the mating surface and put it all together with the plan of using the holes in the spacer to position it for drilling. After the Loctite set up which is less than a couple minutes according to their spec sheet, I drilled it and installed the screws. After removing the screws I tried to remove the spacer, it won't come off even with several good whacks with a hammer and block of wood on the inside edge!
Fortunately, the forend fits just right, at least until it wears some.
So if anyone needs to repair a synthetic forend, BM 380 sticks to it real good, also, adding a spacer is a good way of repairing a synthetic forend that has the "legs" broken.
Tim
http://www.brownells.com/.aspx/pid=6139/product/BLACK_MAX_ADHESIVE