Elderly Kid,
You don't specify what caliber your shooting. However I can tell you (given a good bp lube) that the old BP bullet designs work just fine wether your hunting, plinking or CAS'ing. Others, Iam sure will disagree. Fortunately several old BP designs are still with us today:
44 WCF: Layman 427098 (200 gr.)
45 Colt: Lyman 454190 (250 gr.)
45-70: Lyman 457124 (405 gr.), 457125 (500 gr.) and the Saco 1881 (500 gr.)
All are multi-grooved and hold sufficient lube and in the case of the 500 gr. the grooves are many and big to boot.
All these designs are as old as dirt and are a near exact copy to those offered in the day. Yes, if you look back at the old records you will find that such bullets as the 500 gr. round nose used in the trapdoor springfield were tested to extreme. Troopers were expected to fire lots of rounds fast and accurately - it was a matter of survival.
If you think that it was all because the powders were superiour back in the day - think again. There is a wonderful letter written by Col. Buffington of the Frankfort Asenal lamenting the fact that even after being given samples of high grade european powders to anylyze and duplicate the leading powder mills of the era (Laflin & Rand, American etc. - all owned by Dupont at the time) still could only produce a mediocre powder at best. His frustration was very apparent.
As for bullet lube: Most bullets in the day were lubed with mixtures comprised of a base of bees wax with either Japan Wax, Bayberry wax or Sperm whale oil modifiers. (Japan & bayberry wax are actually not waxes but fats) Various form of Tallow were popular with those making home made lubes. Unfortunatly some, such as those using sperm whale oil had the habit of drying out over time. (The idea is to keep moisture in the lube so it mixes with the fouling after discharge.)
As for powders: Yes there were good powders (Curtis & Harvey, Oriental, etc.) however there was also a lot of low grade canister powders which were very popular due to the low price. Today we are not so fortunate in our choices. Swiss is the only true sporting grade powder available. Schuetzen is graded as a rifle powder while GOEX and Elephant waver between a musket grade and rifle grade.
As for the fouling they produce: the important issue is the type of wood used and how the charcoal is made and the purity of the ingrediants. If the manufacture sources it from the same supplier who made the charcoal for your grill then I wouldn't expect much. This is the big diffrence between todays powders (with the exception of Swiss & Schuetzen) and those of yesterday.
Today, in spite of the hype, only Swiss releases moisture during combustion. Moisture = soft fouling = accuracy over long strings.
It all comes down to what YOU like and what your firearms like.
Best regards (and yes I am gonna say it) Have a merry Christmas!
T.K.