So what is the final verdict on the proper coil count or spring length on a Wolff xtra-power tube spring for a 8 shot mossy 590. I found several good threads, but none of them nailed it down. With the number of these that have been installed over the last few years, we should be able to put this baby to bed! I have talked to the folks at Wolff and a Brownells and nobody will committ to the proper length. You would think by now, as popular as these springs are, that they would be able to provide this information. Oh well, lets see if we can get the info out there!