That long thingy above is kinda funny right from the start... You want a 4150 bbl then you destroy the metallurgy by chrome lining it. The chrome will not build up evenly all the way down the bbl and accuracy will suffer. Chrome is good if you intend to shoot nothing but corrosive milsurp ammo and are using it for a plinker. If you want tight groups, avoid the chrome lined. If you are gonna spring for the extra couple bucks for a stainless or 4150 bbl over a 4140 bbl, the last thing you want to do is chrome it. The only real difference in the alloys from a practical standpoint is the amount of carbon in the matrix which allows for slightly better wear characteristics when hardened, and a slightly higher through hardening capability which isn't even utilized when making gun bbl's. The hardest gun bbl I've ever come across was only about 30 on the Rockwell C scale which is right where a standard 4140 pre hardened blank will put you.
The easy confidence with which I know another man's religion is folly teaches me to suspect that my own is also. I would not interfere with any one's religion, either to strengthen it or to weaken it. I am not able to believe one's religion can affect his hereafter one way or the other, no matter what that religion may be. But it may easily be a great comfort to him in this life--hence it is a valuable possession to him.
- Mark Twain