Since their results are highly variable what an increase in velocity, then a subsequent decrease in velocity, followed by and INCREASE of velocity, then one must call into question the results, or at least the methodology of the testing involved.<quoted text>
1) Boo hew, you got me there, Alice.
2) You'd have to produce chronograph tests to prove your theory, but I'll do it instead:
Apparently, 16" barrels, which is the legal length of a carbine barrel, produce maximum results in both .45ACP and .380 Auto, with negligible increase or decrease of velocity with 18" barrels:
Right back at you, DICKWEED!