QuickLOAD also has bullet lubrication compensation built-in. It works by lowering the bullet start pressure. The idea is that a lubricated bullet will take less pressure to force into the throat and extrude into the rifling. Since it gets into the throat with less force, it will be accelerating sooner and will therefore be a little further down the bore and with more expansion, so the volume the powder is burning in will be a little bigger when the pressure peaks. This is what reduces peak pressure, and that, in turn, reduces the peak acceleration, hence the velocity loss.
If you look through load data with pressures given, like Hodgdon's or Lyman's, you will have noticed the peak pressures of the maximum loads don't normally meet the SAAMI MAP pressure, but rather have different maximum load pressures for each powder. Except for hollow base wadcutters, for which that is done to prevent muzzle blast from being great enough to expand the hollow base into a skirt, it is generally because the firing tests found too much variation in peak pressure from shot to shot to let the average peak value get any higher. The practice affords one way you can get an idea which powders will produce the lowest pressure and velocity SDs. They are the ones whose maximum loads have the highest pressure number. It is highest because the ballistics technician firing the test gun saw the smallest pressure SD with them.
What's odd about the above is that it is not how SAAMI expects ammunition manufacturers to use the maximum pressure number. That number is called the Maximum Average Pressure (MAP) and it is meant to be a not-to-exceed for the average of ten peak pressure measurements. The hand loading data developers do not use it as an average, but rather as an absolute upper limit. This is for several reasons: One is that handloader use load data recipes, while ammunition manufacturers use pressure guns to determine how much powder they can put in. The data for the handloader therefore has to have some wiggle room for powder lot-to-lot burn rate variation. The manufacturer doesn't care about that because he measures the pressure each lot produces before making a run and can adjust the load to correct for it. Another reason is the handloader often want's to use powders he has on hand, even if they aren't ideally suited to his cartridge and bullet combination. Recognizing this, the powder distributors test a range of powders for each round, including some that aren't the best choice and that may have more variation than a better choice does. Another and important reason is that using the MAP as an average requires that the lot not exceed the SAAMI pressure standard deviation limit and that the extreme spread not exceed the SAAMI Maximum Extreme Variation (MEV) number. The average handloader is not even aware of these two specifications, much less able to measure them reliably. So the handload data that is published tries to keep the handloader out of trouble in that way as well.
What all that pressure data business means is that many individual loads could be raised without exceed SAAMI numbers if the powder lot burn rate and other factors are right. It might not be so with your particular lot of powder and choices of case and primer and exact bullet shape. But it could also be the other way around. This explains why many people seem to be able to use loads above the data without any sort of trouble indication, while others cannot.
Finally, as to coated bullet performance, if you have load data for the uncoated version of your particular bullet and you know how much to allow for your difference in barrel length, you can make a sort of simple calculation. Using the table below, take the barrel length that was used to test the load in your data and see what multiplier on the table it has. Then take your barrel length and see what multiplier it has. Divide your barrel multiplier by the test barrel multiplier and multiply the result times the velocity given in the data. If the maximum load in the data produces less than that resulting velocity, you are below their peak pressure. Indeed, if you bring the charge up to match that resulting velocity, you will still be a little below the original peak pressure because more of your velocity is coming from acceleration that happens after the peak than was the case with the original powder. However, the reverse is also true. If you are getting more than that resulting velocity, you are above the load developer's peak pressure and even when you reduce the load to match their velocity you will be a little above their peak pressure because your lighter charge is producing less gas for the post-peak bullet acceleration. These situations are where the interior ballistics programs give you some real help working out about how much pressure difference there really is. You can also use them to grow or shrink the case capacity to see how much pressure difference is occurring at your velocity extremes and to decided if you are actually staying within SAAMI guidelines.
There certainly is no shortage of "i"s to dot or "t"s to cross if you want to get down into it.
