I don't own an 870 / but on my pump and semi-autos I use Rig Grease on the threads under the caps - and while I put the caps on finger tight / once it bottoms out, I back off them about 1/2 to a full turn. As long as nothing is loose - and they don't rattle - why do they need to be that tight ?
Maybe Scattergun Bob can address this issue - if he sees my note ... You want them to hold the barrel on / but too tight is much worse than not tight enough in my mind - kind of like choke tubes inside the barrel / you don't want them to be loose / but too tight is way too tight.
|