ditto what hoot sed... i always store my guns with wet bores.
about a month before the season, i dry patch them well several times over the next couple weeks. i make my fouling shot on paper and then dry patch and let gun rest several hours. i follow up with a confidence shot and dry patch again. my gun is ready for hunting. subsequent shots during the season get "dry patched" only; after each shot. i've never seen 1st shot flyers using this method.
personnally
i'd never fire a shot down a wet bore... especially with hot loads. i've seen extreme pressure signs on spent cases, from "knuckleheads" at the range, thinking a well oiled bore contributes to accuracy.
in fact, just the oposite is the case. even a fine film of oil on the bore surface will pile up in front of the bullet's bearing surface as it screams down the barrel. this effect actually causes an "over run" or "hydraulic wedge" condition as the bullet out runs the oil wedged between it and the bore. almost always, the pressure signs can be seen on the cases. most often though, it's the unseen effects of "wedging" that cause the bullet jacket wall to distort as the bore diameter is redused momentarilly when the bullet "over runs" this wedge producing a less than perfect bullet to bore contact for the rest of it's trip down the barrel.
worst case scenario, this can leave pressure dimples in the bore, especially in featherweight barrels.
if you've ever slugged a barrel before
you know what kind of pressure we're dealing with here. now, imagine slugging it in a micro second at pressures of 50,000+psi.
scarey stuff
it's been my experience
that there's only one way to work with a cold barrel flyer... and that's sight it in cold!
i've had a browning lever action 308 with a 4x leupold scope for over 30yrs, that's a one shot gun! i've taken more deer with it than all my other guns combined.
but it will not put two shots together at 100yds. it's so temperature sensative, that i had to shoot it (from a solid rest) make my scope adjustments and put it away until my next shooting session and repeat the process until it would shot point of aim at 100yds with the first shot. needless to say, this was very time consuming, but i can pick it up tomorrow and know it will hit within a 2" bullseye at 100yds on the first shot. not a tack driver
but a killin' machine non-the less. for this reason
i have only one handload developed for it using a 150gr Speer Grand Slam.
good luck... and post your results.
hunt when it's cold; fish when it's not.
South Louisiana IS the sportsman's paradise!