I bought a box last year and started hearing about overpressure concerns on other discussion forums, so I called Remington. The guy I talked to asked what kind of gun I was shooting so I told him a Rem 870, a fib because I shoot an Extrema 2. He said there was nothing to worry about because if something happens to my "870", Remington would repair it. That told me that there may be some issues, or that they weren't real sure, or something else was going on so instead of taking a chance I gave the shells to a buddy of mine that shoots a Rem 11-87.