10-4 Mr. Gritdog,
Maybe the OP has had some bad luck as I did for several years and is frustrating.
Fortunately my tire failures were detected by vibration from the bulge in the tires or by inspection at a stop and pulled off before they blew. Always on a rear tire either side. Had a series of this problem ( maybe 4 times over 5 years) only during the summer hot months with camper on) with Goodyear Wrangler and Remington tires not bought at the same time. I believe Remington was also made by Goodyear at the time. Running Hankook the last 6 years with no problems and now on my second set using the new tire pressure gauge over that time frame.
Don't trust the cheep gauges and cross check between gauges. Insist on steel valve stems. Check the TP first thing in the morning before the sun hits them. Inspect at stops. Avoid potholes! Good luck with that.
80 lbs per tire gives about 280 lb extra carrying capacity on the rear axel vs 75 lbs per Goodyear chart on my stock 245/75/16 E rated tires. 6084 vs 5800. These tires were widely used on class C motorhomes as well in a dully configuration.
Next truck will be a dually and of course a heavier camper!