The Spanish Flu of 1918 died down during August and nearly went away. But it came back with a vengeance in October, because the weather started getting colder and people started moving back indoors and having large gatherings. COVID isn't flu. But it is a viral epidemic. Don't take unnecessary chances.
@SSmith1226 Where is Gort when we really need him?
Pun, n. A form of wit, to which wise men stoop and fools aspire.
— Ambrose Bierce
Try.....
Monster Oil "Original" (Somewhat similar to Hetman #2) or
Monster Oil "Smoother" (Somewhat similar to Hetman #3)
Hetman #2 is my "daily driver", but I have this one particular horn that is only happy with Monster Oil "Smoother". Don't ask me why. I have no idea.
@Dr-GO Dude. Sorry, but that comment is not OK, even if it was lighthearted. There have been times in my life when I made that kind of money and paid those kinds of taxes. (And I'm not an MD.) But there are people on this board who struggle to come up with $100 for a new mouthpiece. I don't make your kind of money today, and I'm lucky enough that I don't need to. But this is a site about trumpet playing. I know the OP was about one of Louis Armstrong's collectible horns, but have a little compassion for the players just trying to get by on gigging.
OK, so thinking about this a little more....
Mouthpieces are made out of silver-plated brass, gold-plate over silver-plated brass, stainless steel, and plastic (acrylic or Delrin). A small number of craftsmen even make them out of wood.
If you had a reaction to the "more professional mouthpiece" loaned by your instructor, it might be a reaction to silver or brass (if some silver plating is worn off), or maybe even nickel in stainless steel, if the MP is SS (doubtful).
If you had a reaction of the (presumably new) gold plated MP obtained by the school it might conceivably be a reaction to gold, but that would be quite rare. Most metal contact allergies tend to develop slowly over time with prolonged and repeated contact.
If you tested negative for gold allergy, but had an immediate reaction using a new, clean gold-plated mouthpiece, it could be something other than the mouthpiece.
As suggested above by several people, thoroughly clean, disinfect, and flush everything including all horns and all mouthpieces. Then try using BERP BioOil lubricant, if you are not already using it.
Then try the gold-plated MP again.
If that still doesn't work, try one of the ACB acrylic-topped or Delrin-topped mouthpieces mentioned above by flugelgirl.
@tmd He didn't say he's not allergic to silver or brass. (Sorry for the double negative.)
Delrin (plastic) works well for some people with metal allergies, but they're not cheap. Maybe the college knows of a source where you can borrow one to try.
https://store.wedgemouthpiece.com/665mv-trumpet-top-plastic/
It was the Zimmerman telegram that finally convinced the USA into enter WWI. The USA had gone to great lengths to avoid war up until that point.
@IrishTrumpeter The significant thing about the 7C is the shape of the rim. The inner lip of the rim is very "sharp" while the outer rim is heavily rounded. Some people think this makes it easier to lip between notes. The cup size is about average or maybe slightly smaller than average. The combination of the rim shape and the cup size might be making it easier for you to hit and hold those notes. The 7C is the standard mouthpiece often given to beginners for the reasons above. Some advanced players continue using it if it works for them. Other advancing players switch to something like the 3C which has a slightly larger cup and a flatter rim. The larger cup helps with tone and the flatter rim helps with endurance. If you want to try a "smaller" mouthpiece, one of the most common ones is the 10.5C. It has a fairly flat rim. Vincent Bach himself said the 10.5C was the perfect mouthpiece for C-trumpet or "anyone with weak lips."
And now for something a little different.....
https://goldcountry.craigslist.org/msg/d/nevada-city-unique-multi-instrament/7182908020.html
@Rapier232 Great story, Rapier232. But when you do eventually get to come visit the USA, just remember that Texas isn't well, you know, quite representative of the whole country. Let's just say it that way. And, oh yeah, visit in the wintertime. Coming from London, you won't be acclimated to Texas summers. And, oh yeah #2, buy travel insurance and medical evacuation insurance. You don't want to get sick in Texas and try to get treated with NHS coverage.
@BigDub I swear on a stack of bibles that I am good personal friends with the professor of forensic pathology who said the last one.
@Vulgano-Brother "You're gonna need a bigger trumpet", to paraphrase "Jaws."
Senior political appointees serve at the pleasure of the president. This includes cabinet secretaries, assistant secretaries, etc. Career civil servants do not.
Costco "office glasses" work great for me. They are "blended bifocals" with middle-distance prescription uppers and reading-distance prescription lowers.
Everclear is 75.5% FWIW. I was using it as hand sanitizer when the stores were all sold out.
@GeorgeB You know, I had a set of those "Sound Creation High Speed" springs lying around in my spare parts box that I bought a few years ago and never used. I put them in and couldn't tell much difference between them and a new set of Bach OEM springs. I have a "Pro Constellation" C trumpet I bought from a guy that has VERY stiff springs. I don't what those things are, but you really need to mash those valves. They are very fast and very reliable, but you gotta really muscle them.