I agree with most of your posts. This post however is not exactly correct. A longer bullet has a greaterpotential tohave a drag reducing profile. Therefore the benefit of the longer profile may (and does) in many cases, overcome the benefits gainedby the heavier bullets SD.
This is why the 338 cal bullets with aluminumRidge metioned earlier perform so well. Remember the formula is SD/i = BC and the longer bullet will always have the potential to outperform the shorter more dense bullet with regard to "i"/Form. If the SD of the bullets is equal the longer bullet will always have the potential to outperfom the shorter bullets with regard to BC. At some point however stabilizing a longer bullet and the loss powder capacity become a problem.