Necessary lesson
I want to preface this by saying that no one in particular is being singled out, so take this first point to heart.
Anyone with experience with a particular item (gun, toaster, car, etc.) of their own and possibly a few friend's examples is insufficient level of exposure to be able to make any blanket statements about the general production quality specifics of those items.
The miniscule number of the vast total mechanisms produced that any one layman can ever see will be dwarfed by the examples of troubled items seen by a repair specialist.
Layman opinions are very valuable when taken in context of personal experience that may be considered as a piece of a large puzzle, but any other value is purely anecdotal.
Everybody knows someone that lived to a ripe old age in spite of being a heavy smoker, and non-smokers have died from lung cancer without ever lighting a "coffin nail".
When you have a hard-to-diagnose problem, you need a specialist. If my Chevy has some problem that several shops haven't been able to cure, go to the Chevy mechanic with plenty of shop floor time, not the local quikie-lube wrench jockey.
Now, on to the problem at hand:
we have 5 shooters that have had no problems of consequence with their guns, plus a few tips about cleaning, lube, chamber roughness, etc., and all of those and a few other tips should be put into one gigantic generic posting that beginning searchers should use for a basic grounding of what to expect to be told in this sort of posting.
It reminds me of the generic article around fall that gives basic winterizing tips for your vehicle. You'll need the manual to know what you need to do to winterize an RV, though.
What details that everyone has posted about their own personal experience has gotten me closer to solutions for various conditions.
Removing a barrel to free a stuck shell is not a sign that necessarily proves a rough chamber, especially if it happens with only heavy loads. The chamber may be oversize, as one possibility, but I am betting that I would need to see the mechanical parts also to rule out any engagement problems with the parts. Combined problems are more common than you think.
Short stroking is probably not the big problem that may be presumed by some advisers, but is a slight possibility, along with weak pumping force.
I had a series of hard lessons all combined in one gun, and the totality of the combination would put any Detroit lemon to shame.
This Maverick may be able to approach that stellar example.
These guns need a good go-through with attention paid to the parts fit and engagement, but since you may have a warranty in effect, you might not want to spend money with me to improve your performance. If your gun is out of warranty or is not being properly repaired by the Eagle Pass repair facility, I will give it a try.
