Hi Mark- Taylor and I have both found excellent accuracy with Dphar's favourite hunting lube - Neestfoot Oil. Taylor went through, probably close to 70 shots or more on Sunday and didn't have to wipe his bore, however he felt his accuracy was not as good as with a water-based lube as we commonly use for trail walks (target shooting) on Sundays. At 25 yards, he made a small black hole about 5/8" in diameter for four 4 shots on paper- offhand at 20yard, .50 cal. flinter (his cheatin' gun), yet the load did not hold accuracy to 100 yards. He just wasn't shooting as well as normal - which is nasty-good.
I have tried vegetable oils my wife purchased, and they didn't shoot well and they also fouled badly. Track's Mink OIl shoots well for me, is very slick and allows all day shooting in both my .32 and .40 with excellent accuracy that does not suffer at all.
As to accuracy was 25 yards, even a smoothbore with tight patch will shoot into an inch - mine does, as does Taylor's. I'd test that .36 out at 35 to 40yards when trying to find a load for it, if it was mine, that is. 25 yards just doesn't seem to give much of an indication. I test and developed my accuracy load with my .32 at 50 yards as well. At 25 yards, 20gr. will cut a very tiny hole for 5 shots - about .4", but at 50 yards, that powder charge shoots over 2". Going up to 35gr. puts 5 shots at 50 yards into 1" with monotonous regularity, and still shoots that .4" hole for 5 shots at 25 yards.
It might shoot at 25 yards, but not at 50 yards. If it shoots accurately at 50 yards, it will shoot well at 25 and 75 as well. I use the 35gr. charge for all ranges on our trail - including the targets from 90yards to 109 yards. Yes - the little .32 works just fine on the 100 yard bunny as well.
I assume you meant Hoppe's #9 Plus, not Hoppe's #9. Without the 'plus' on it's label, it's a straight smokeless powder solvent. You are using real BP, aren't you?
When I was testing lubes back in the 70's, I found crisco shortening pressed into the patches to shoot OK, while the liquid Crisco Oil didn't shoot worth a hoot & neither did Olive Oil. Neetsfoot Oil, Mink Oil (contains mink fat I'm sure), Bear's oil and grease, marmot Oil - These all worked for me for hunting lubes.
I hate to hear a guy had to wipe his bore more often than when he cleaned it after all the shooting was done. Your patch thicknesses sound good - especially the 11 1/2oz. denim. I use 12oz in my .69, but 10 ounce in everything else, including the .32, with a .311" ball (narrow grooves). I'm sure the .350" is just fine in about any .36.