I have had problems with the Walmart value packs of shotshells sticking and not being ejected, Winchester being the worst. I purchased a gauge so I could check each shell and found that about 1/4 of the Federals did not fall into the guage without force and I ran into a couple that I just would not use. On recommendation I purchased some Winchester AA and they were worse than the cheaper Federals. I have been using the low recoil Fiocchi slugs without a problem until I got a box the other day that 80% would not fit in the guage. I need to find some shells that are made with some quality control. What are you using?