It has also jogged my memory a bit; Sometimes the forends are no inletted deeply enough to get the forend iron up where it should be on the barrels. The J sppring, and the coil spring versiion, are over-center limbs and must go past center to hold position. Take the wood off and try the forend iron on the barrels, see how close it is to the flat of the loop. Put the wood back on and use a little piece of modeling clay on the iron to see how much it compresses, how far the iron goes up to the loop flat. I still think the J spring should hold the feoend on. Just another variable.
