Bbl length in a pistol is related to accuracy basically from a sighting
standpoint. The longer sight radius will allow a mathematically finer "hold". Ransom resting pistols reveals zero difference in 50 yd accuracy in relation to bbl length. Bullseye shooters (Camp Perry types) use a longer bbld pistol once they reach a high level of ability to gain the sighting advantage. The long sight radius will drive a new shooter nutz as this is a one handed, unsupported discipline.
If you are in the woods and obviously not competing by the Marcus of Queensbury Rules, carry whatever bbl length you want to put up with. If you are going to use some form of optics and not shoot "irons", then accuracy because of bbl length is a moot point.
The best thing you can do for accuracy is to buy a half dozen brands/styles of ammo and see which ones 1) funcion reliably and 2) give the best groups.
As you have realized by now, every bbl is different. Some find the cheapo will shoot as well in their particular pistol as a box of Eley costing 2-3x as much. Some are more highly lubed (waxed) and that can create problems so you pays your $$ and takes your chances.
I am still sorting out my Mod 41 as to reliability feeding and it seems that there are about 2-3% FTfire because of lack of priming compound - indexing them 3 times and still not going bang. Going to try some CMP ammo next and see how it fares. I have personally found the Rem bulk and Subsonic to be pretty dismal quality control wise.
I know this rambled, just can't quite get all the synapses firing in order this AM.
