Bill, don't be afraid to try an even larger ball with that .018" patch. I find the small bores easy to shoot with oversize balls - especiallycompared to larger bores. In my .36, I shot .375" RB's with a .022" denim patch. I did use a steel rod but it wasn't necessary. The muzzle had a good funnel, polished smooth to allow the ball and patch to swage into the bore itself. Of course a ball this size turned into a short slug, round-ball shape on each end. Once into the muzzle, they loaded easily in the slick bore using spit for target or bear grease for plinking in the bush.
I'm not suggesting you try a .34cal ball, just to show what you can actually do with small, soft, easily swaged balls. Maybe a .320" ball will be the 'ticket' to great accuracy in your rifle.
The muzzle crown's shape and finish is very important. The tip of your thumb or index finger and 320 emery cloth with some oil, even WD40, works wonders, followed by a tapered stone wrapped in 400 grit wet or dry. A very smooth radius is what you're looking for. Once swaged in, it's a piece of cake to seat it. A short starter, of course is needed. I use an antler's base for the handle with a 4" to 6" shaft of hickory. The antler gives some weight over wood, and it only takes a light smack with the palm to seat the patched ball into the muzzle, then another with the shaft to seat it down far enough to seat on the powder with the rod.
Note the short brass stud sticking out the end of the starter knob. This is placed on top of the ball sitting on the patch. One smack on the other end and this short stud puts the ball and patch down into the bore about 1/4". From there it's a push or light smack to seat it down the 4 to 6" of the shaft. This all takes just a couple seconds to do. It is not time consuming loading - faster even than fighting with a long rod to get a thinly patched load started.
: Note, the short starter is NOT used as a hammer to tap, tap, tap on the ball. Tap, tap tapping only distrots the ball. Putting it down into the muzzle with the cupped end of the short stud does not damage the ball in the slightest. The brass end on the starter's shaft is also cupped and does not damage the ball in the slightest. I use appropriate ctg. brass with rims turned off for starter tips and studs. They are cupped using an electric drill. All easy stuff. You can even purchase them.
I should also add that the leadther 'pad' on the shaft is to protect the muzzle when smacking the starter's top to seat the ball down into the bore. Taylor and I pretty much use the same methods to load and both take only about 12 to 15 seconds to load our rifles when at the range. Maybe this is why we have so much trouble with mirage -
Edited to include this last couple paragraphs and picture.