Mark,
Hot shot nipple is good, Spitfire from MSM is a little better according to chrono tests I have done.
On my big bore rifles, I am kind of fond of using a musket nipple and cap. MSM makes a 1/4-28 x musket nipple that works great. I happen to sell them if you would like one. Or two.
As far as loading, do pop a couple of caps prior to doing anything else. Dry out the passages so residual oil will not foul the shot. Other than that, load as you have been.
I prefer RWS caps, but here all I can find is CCI and they work OK. If you use a #11 cap, make sure you use the #11 magnum cap. It's a little hotter.
Don't drill out the oriface unless you are using TRESO berrylum nipples. TRESO puts a really small hole in it, the rest of the major manufactures do it about right. Too big a hole will cause backpressure to excape, thus causing the hammer to blow back, possibly damaging the lock.