Here are the completed tests on 2040 and 1842 pseudo-taper band sets, same methods as in previous post.
Again, I started the tests with .30 caliber (7.6mm) lead balls weighing 39.7 grains, and used increasingly heavy ammo until the power started decreasing. Note that with the 1842 set at full draw, there was still a slight power increase with .495 ball, but since there was a decrease at 30 inch pull, I stopped at that weight.
Peak power of 12.46 lb/ft (16.9 joules) was reached with a 125 grain .429 (11mm) cal lead ball at 212 fps. Maximum recorded velocity was 302.7 fps with 2040 and .30 cal lead. The chart below shows averages.
Edited to correct graphic.