Hey Michael,
I'm way late to this thread and honestly, didn't read all the responses to your post. I just skimmed through them.
When I was shooting PRS with a centerfire, years ago, I tried just about every lube available with mixed results. Then back in 2016-2017 when I got really serious about testing .25 slugs and sharing the information here on AGN, the thought definitely crossed my mind. Back then though, the .25 accuracy was so bad, none of that would have helped.
Most all of the barrels and the appropriate slugs just weren't very good. Shooting .25 slugs in airguns seriously was fairly new. There were of course, a few exceptions like Airforce/Lothar Walther, but in general, most barrel and slug combos weren't great! I remember shooting 50yd, 10 shot groups that were 2-3 inches!
However, in just a couple of years, the performance of both the barrels and .25 slugs increased exponentially! Accuracy increased so much in just a short time that the thought of polishing, waxing, lubing and trying different compounds to squeeze every bit of accuracy out of my airguns crossed my mind again. So of course, I tried all of them that I could. I didn't find any that I felt were worth the time, expense and effort!
The point of this long winded post, finally... I tried most all of them with very little success. I didn't see much different in accuracy or the ability to keep barrels from fouling. Some we're okay but there were no real standouts that made me want to change the procedure I'd been using.
I always thoroughly clean new barrels, shoot them a bit to get some lead in there and get a baseline. Then I clean them again, polish them pretty angressively and wax them lightly with Renaissance Wax. I also always lube my slugs with the WD-40 silicone formula in the silver/blue/yellow can. It's not a magic formula, sometimes it helps a little with accuracy, sometimes it doesn't. It certainly never hurts accuracy though! The big benefit of cleaning, polishing, waxing and lubing is that I rarely clean any of my slug airguns and they're all great shooters... My .25 Skout with the Corbin 48.6gr slugs at 990fps, my .25 RAW with Zan 33gr slugs at 970fps, my .25 MKII with Zan 37gr slugs at 980fps, my .22 M3 with the Zan 30.5gr slugs at 1040fps are the most accurate combos that I've ever owned! I've even cleaned, polished and waxed the barrels of our pellet shooters, the Maverick and Red Panda and they're superb pellet shooters!
These are just my results after shooting lots and lots and lots of .25 slugs. Half the fun of shooting airguns is experimenting, testing, trying new things and shooting some more until you find what works best! When you finally shoot that teeny tiny group, it's so awesome that all the testing was worth it! I never take anyone's word for anything 100%. I listen to what people have to say, use it as a starting point or just additional information and then I test for myself. I always suggest people do the same.
Everybody have a great week!
Stoti
