Get your back molars checked. Sometimes having your upper molars removed will take care of sinus headaches. I read about this the other day in a dentists office. It will require dental x-rays but getting rid of the pain might be worth it
if your shooting targets CCI standard velocity is nice.
22lr may be dirty but it the fouling doesn't get hard it cleans easily , solvent ,a tooth brush , and a bore brush and you will be cleaned up in short time. just clean every time your out in bad weather or they start to stick when they extract.
also , keep the bulk of your 22lr at home sealed in a ammo can , 22lr is not sealed and will be effected by moisture , it doesn't do your ammo good to sit in the glove box of your truck in the heat and weather.
Welcome, I'm not much help since I just started water trapping last spring and land trapping this fall. But welcome and if I thought I was addicted to waterfowling, trapping is just as addicting. Personally, I found it more effective to dye my traps after they had a good thin layer of rust on them. Seemed to help the dye stick much better.
Think refrigerator temperatures. Bacteria can grow at temps above 50 degrees. A week is pretty standard... some people will hang for 3 weeks at 34 degrees, but I've never done that. A week around 35 to 40 degrees has always been good for me. If temps aren't consistent enough to hang, you can quarter it and put it in the fridge for a week.
I have several old mausers that were carried by old timers I grew up hunting with. I have my great uncles 30-40 krag that was his main deer rifle from the '50s-2001 as well as one of my great grandfathers old eddystone 30-06 that has been passed down through the years. I, as well as most of my family members have hunted with them all over the years. I still grab that old 30-40 krag once in awhile and a neighbor kid just shot a fork horn buck with it 2 weeks ago.