I just got myself a well-used trade-in 870P, and have only the first clue about how to use it. Last week I took it apart, cleaned and lubed it (for what looks like the first time, ever). Never seen a dirtier gun in my life. Never could get some of the plastic out of the barrel...
I'm hitting the range tomorrow to wring it out and would appreciate some ideas for drills or standards to shoot for. The ones I've found online are not wonderful. If you know of any, please post them or a link here. Thanks!