Silicone RC shock oil for pellet lube?

Thanks Mercs.

High Pressure is a rather broad term, its like how long is a piece of string.

Yes, a very good post, especially as it alerts us all to the potential for mineral oil based lubes to ignite/explode ( very much like how a Diesel engine works).
For pellet lube I use Napier Power Pellet lube. This product is not mineral oil based. It can be difficult to buy in NZ but can be purchased on the web and shipped here.
https://www.napieruk.com/products/power-pellet-lube-10ml
I don’t believe all the manufacturers claims but it does keep the bore clean(er).

So after giving all of this much thought (but not much testing I must admit) I have come to the following LOGICAL conclusion, (because if you think about something for long enough, then come to a well thought out conclusion, that must me logic, right? Of course!)

My conclusions are thus: looking at the shape of a Diabolo style pellet, the only points of contact between the pellet and the barrel are the widest part of the head, and the widest part of the skirt. Expressed as a percentage of the whole surface area of the pellet, that is a very small percent of the pellet that makes contact with the barrel.
I feel it is not worth lubing the entire surface of the pellet, just to get a minute amount of lube onto the bearing surfaces where it contacts the barrel.
So I don’t think it's worth lubing pellets. You would probably be better off trying to lube the inside of the barrel, but that’s another discussion for another time.
And besides I have achieved excellent accuracy from many pellet guns shooting thousands of unlubed pellets, so I’m going to go with the “if it’s not broken, don’t fix it” theory and shelve the “pellet lube” idea.

Slugs on the other hand, well, now they are a different kettle of fish.
Exponentially greater bearing surface between slug and barrel, and with the absence of an expanding skirt to seal the barrel and keep pressure behind the pellet, slugs rely on a tighter fit to seal the barrel and stop air escaping around the slug.
They will almost certainly benefit from a lube to 1- ease the passage of the slug through the barrel, and 2- help seal any tiny gaps between the lead and the barrel with a viscous layer of lube.

Now I feel that the requirements for an accurate pellet shooting gun, and the requirements for an accurate slug shooting gun are different enough to warrant having two separate guns, each set up specifically to do the required job. And seeing that I don’t yet have a dedicated high pressure, long barreled slug launcher, my theories on slug lubing will have to wait, but hopefully not for too long, until proper lubed slug testing can begin.