I agree with Lee's post.
Each shotgun has their own quirks about which ammo. Firearms in general.
Re: Winchester. Experiences mirror what Lee shared. The brass ain't "brass" - not that we need "brass" because Activ shotshells didn't have brass and these fed and extracted great! Even reloaded these held up.
My beefs : Ammo for a good price has to have correct specs, they have to feed and the extractor has to "extract".
1) Some of these great buys do not have a "brass" worth a flip. The "brass" where meets plastic, hangs up on feeding - and then if the shell gets into the gun, if out of spec (too long) we have serious problems. Then if this shell fires, the extractor does not extract and we get to practice malf drills.
2) Chambers: Been discussed before in regard to being out of spec, rough, how to check and how to fix.
3) Extractors: We have a new wrinkle cropping up. Sometimes the extractor is MIM and causing problems. Have a extra bolt complete with extractor with old style extractor handy [ this will work for 870, 1300 1100 and a few other guns] . If an extractor "goes", have it replaced with old style for backup.
3a) Some extractors are not cut correctly on some newer offerings, akin to extractors on 1911 should have a certain depth, and angles...qualified gunsmith is whom needs to check and correct.
4)Messin': Semi guns get set up to run buck and slugs, them ports get messed with and will not run with these bulk pack loads - or - requires 3dr eq.
Meaning - the really great buy - buys frustration in trying to get a 2 3/4 dr of 7/8 or 1oz load to run.
5)Semi: Repeating above - some guns are going to require a certain payload to run the gun, That is the way the gun was designed to port gases/ use recoil operation. Know the gun, know what the gun was designed to run with.
Great buys are not great buys if the $1 costs you frustration in learning, and gets real expensive if you drop a bird in clays, disrupts a shotgun class...Saving money is fine, getting quality for what you pay for is always better.
Choices: Personally, Federal bulk pack. Last I used [hope not changed] in spec and had "brass" - worked in everygun used in.
I have not been where bulk packs are really sold as some of you frequent]
I have been using a variety of loads that are quality, and work in a variety of guns. Some I choose for the ability to reload, some are not. Fiochhi, Peters, for instance reload. Kent and Sport load, not for reloading and equal to or less than bulk prices. Say Gander Mtn, Academy ...etc.
I reloaded nothing but Win components forever. I have fired hundreds of thousands of AA compression formed hulls. That hull is no more. HS replaced it and it is not the same. You want the Compression Formed, get STS by Rem or Peter's [Blue Magic]
Seems I paid $4.99 for Peter's in a target load, last heard these had been reloaded 8 times already, most likely will go 12. For the money, a better loading by reloading. Hard shot being the key.
Steve