Well I sure don't have to worry about sub-freezing temps down here in South Alabama, so I think I'm good to go. And you are saying that I don't have to worry about varnish shooting castor oil as a patch lube? right?
Not sure on the varnish - I'd say no problem IF there is a perfect seal between patched ball and grooves. I'm not sure how much compression that means - ie: ball size + 2x 'actual' patch thickness = X. "X" must be "Y" thousanths LARGER than the groove diameter to create a seal that will keep pressurized gasses behind it.
I've picked up patches from loads that shot what I would call cleanly, patches that were reusable, - yet they had small narrow brown scorch marks around the perifery, almost invisible, but that showed there was leakage. This is the kind of leakage that could (?)/might/maybe create brown gummy residue from the Castor oil. If it does, if will be most difficult to get out.
That brown gum residue is the residue that Harry and other's experienced with moose snot lube - in which the original formula had castor oil along with Murphy's OIl Soap. They blamed the Murphy's Oil Soap - perhaps they didn't use any castor oil in their mix. If their mix, I'd be blaming the castor just due to having experience with it in my model engines. I love it's lubing properties but not it's gumming properties.
It's all well and good to make statements about lubes such as I use X or hunting and Y for target "period". It works for me - but the statement tells us little (who like details), very little.
It's great information - but - how well does it work - do you shoot all day without having to wipe?
Do you have to wipe between shots or do you only wipe because you want to, say, every 10 or 20, but don't really have to wipe?
Does it load the same for the 20th as it does for the 1st?
Those are the lubes I currently use - for hunting - an oil/grease and target, a water based lube allow all day shooting if you want, load the same - or easier for the 80th as they do for the 1st.
It is the combination that actually seals, not the lube. The lube assists the patching by allowing it to move and adjust into the corners without folding incorrectly. This helps the patch to properly seal, it doesn't seal by itself. Without the lube, a fold across a land and groove could allow gasses to escape there, causing a burn-out or misdirected muzzle blast resulting in a thrown shot. Ever get fliers?
How many shots can you make with a hunting lube (oil or grease) before accuracy falls off or you cannot load another due to fouling buildup?
The say I see it - there is hunting, and there is hunting.
We go bunny hunting in the winter, squirrel hunting in the fall and winter, and moose, deer, bear, pig or elk hunting in the fall as well. Most use different rifles, smooth rifles or smoothbores.
The needs of these varies from having to fire many shots - without wiping or loss in accuracy - to only needing to shoot 1 or 2 - without wiping yeah - I know - some of you like to wipe your bores between shots - I don't. I need a lube that allows me to shoot the way I want - top accuracy, no wiping. It is a tall order - but not impossible as about all of us up here, use one that works. Some use it for both target and hunting.