I had an M85 and a M327 with frame tolerance issues that required extreme gun smithing and custom fitting of stock parts just to get the firearms to cycle. It seems lately the most prominent of these tolerance issues seem to be the size of the hand and cylinder stop slots cut into the frame which allow the cylinder stop to access the cylinder and the hand to access the rivets on the star Assembly, (the recoil shield finishing also leaves allot to be desired but we won't go there now). If these are cut too wide they will cause timing issues due to the play of the loose moving parts. For example the cylinder stop slot in the frame of the M85 was machined too wide causing excessive side play in the cylinder stop, irrelevant of how many stock cylinder stops you installed since the cylinder stops are machined to a certain tolerance or width. The excessive side play in the cylinder stop caused play in the cylinder and the cylinder bores to overlap with the barrel which caused leading and accuracy problems. Instead of trashing the revolver taurus will stretch the forcing cone(adjust it) so that it is so wide it will accommodate any overlap. This will continue to cause accuracy problems, blow back and weaken the forcing cone substantially which may lead to tearing of the forcing cone since it is under extreme pressure. With a stretched forcing cone being wider than the cylinder bore and bullet and then tapering back down at the rifling will cause hot gases to build up in the pocket of the forcing cone.
With a forcing cone that is cut at an extreme angle like yours they will probably try to cut it more lessening the angle and leaving you with a monster B/C gap.
Unfortunately when manufacturing revolvers using what I am guessing 100% MIM with no hand finishing you are rolling the dice whether you get a run with correct specs or not. One tiny glitch in the molding or computer finishing and you end up with a paper weight. The only re-course is to rely 100% on the warranty process. Keep sending them back until they get it right or send you a good one. It's to bad really becuase the design and engineering of the revolvers are very sound however the manufacturing can be very hot or cold and does not seem like there is much QC going on in Brazil. This is just guess work on my part but I don't think many folks even Taurus Miami exec's really know what's goes on at Forjas Taurus other than what they are supposed to know. Bottom line we choose to purchase these revolvers so we must lie in the bed we made and do the best with what we got. You keep buying them like me you will get to know your FedEx reps well LOL.