4-gauge double barrel?
Fuck me, thats got to have some recoil.
I've been looking on ebay just recently for some decent capacitors, with the intent of building a quality, highpowered gauss rifle, we have an old (pre-war, no idea by how long) metal capstan lathe here in the toolshed that would be just perfect for carving out rounds from steel stock. Got a few big old electrolytics here that are pretty juicy, but they do need reconditioning. Don't have many, only the four, but judging from the size and thickness (almost 4mm thick) of the bus-bars connecting them as the are wired up now, methinks in a marx generator configuration, or cockroft-walton, (with a big beefy diode array on the return path to avoid any accidental depolarization and destruction of the cap dielectric, they might well be able to produce sufficient magnetic field in a solenoid to propel a round fast enough to do some damage.
Either way, will be fun trying. Firearms are hard to come by in the UK. We have such a govt full of bellends almost continually, that they are afraid of the populace having any means to defend themselves. Although they go even MORE mental when it involves explosives, as I found out a few years back.
Nickel is known for causing allergies, but most other metals aren't. Gold certainly doesn't, it is more or less completely inert, aqua regia is one of the very few things that will attack and dissolve gold (a mixture of concentrated hydrochloric and nitric acids, this forms nitrosyl chloride in situ, which will attack the gold), apart from probably fused molten cyanides (this even dissolves iridium, a platinum-group metal noted for its extreme hardness, great weight, and near impervious to attack, other than by molten cyanides and molten caustic bases (E.g NaOH)
I figure mercury attacks gold also, presumably forming an amalgam, as some third-world gold panners use a pan filled partially with Hg to pick up and dissolve the gold, which is then distilled off to leave it behind.
Surprising you aren't allergic to poison ivy/oak/sumac though, given their ability as an allergic sensitizer. Although, if you have only encountered it once chances are you won't react, as the urushiols present in these plants are indeed allergic sensitizers, a prior exposure is required before they will cause the typical blistering.
Last time I did halloween dress-up, I hacked together a hoodie and a goat's skull (minus the goat), so that the skull poked out of the hood, giving a grim-reaper kind of look. Proper shit up more than one person who had their door knocked on
Mosquitos rarely bother me, although they used to, but not now.
Spiders, never had a problem with one I didn't inadvertently antagonise, the only bite I can recall, was from my pet brown widow, whilst cleaning her enclosure, after she had just laid egg sacks, and presumably was still pregnant with more. I never got to find out, as she, and all the couple of hundred-odd baby widow spiders I'd raised were murdered by police when they raided this place once.
Fucking sank her fangs into my hand, although usually widows in general are very shy and gentle spiders. NOT a fun experience, the day after the bite I felt as though I had been run over by a truck.
Never encountered poison ivy and friends, they don't grow here (wish I could find seed actually), so I don't know about that, but otherwise the only thing I'm allergic to is beta-lactam antibiotics (the penicillins, and presumably the carbapenems, although these are reserved for the most intractable resistant infections, and share apparently only partial crossreactivity, immunologically speaking, with the penicillins) and presumably anything else with the beta-lactam cyclic amide motif also.