I'm not shooting the semis. On something like a bolt action, I probably hardly oil it at all. I might grease the lugs very sparingly, and other than that, I clean the barrel with engine cleaner or something like sweets. If it is blued, and I have always tried to get SS, I probably need to whipe it down with something to protect the blueing. Mostly I try to whipe me off and then give it the lightest possible oiling. I might use something that has a cover scent if I could find it.
"I am still going to recommend G-96 Gun Treatment. It is silicone based"
I try to keep away from silicone whenever possible, bad stuff. Very tenacious and screws up a lot of things from electrics to finishes. Prefer not to have it on the property. I have this little pot of silicone gun gel called STOSS, lasts for ever, and occasionally I have had to use some. It is extremely high performance, and at one point I used to use it as a lubricant on my dead center (lathe). But there is usually something better out there that is completely natural, like in this case beeswax! That stuff plays well with others from finishes to foodstuffs, and would outlast the stoss 100-1.
One reason not to use motor oils is possibly because they are toxic. Seems as though just about anything in those products sooner or later needs to be swapped out. I wouldn't want to be taking a bath in any of that stuff. Car engines are amazingly durable, but in the rest of the world there is usually a perfectly fine simple product without a lot of very nasty additives, if only one uses the correct grade, meaning mostly the right weight or thickness (don't know correct term). So many people go for a spray can of penetrating oil when they need some grease, so of course that can has to have "space age" properties, because it is being totally misused.