Barrel install did I mess up?

[5spd]

Every aftermarket Savage drop in bbl Ive bought had to be hit w.sandpaper to knock the threads down then screwed right in.
Even the bbl nut fit it perfectly, but would not screw in past 2 turns when I tried the bbl before knocking them down.

[scythefwd]

I've only done one barrel. I did it under the watchful eye of the guy who does it a lot, for a living.

I was warned about clamping the action wrench down too tight and warping the action and I was warned about cross threading. Luckily I did the spin backwards till click thing before I tried to screw it in. Never had an issue with it even attempting to bind. Granted, it was a shilen barrel, and I've always considered them to be a top teir barrel... I have no experience with any of the other barrels.