faatjack, your 182 is truly a 182!
In your look-ups, note that for each year, it starts with the BEGINNING S/N for that year
. Sunflower Ammo.com: Ruger Mini-14/30 Barrel Twist Rates
If your S/N is lower than the beginning S/N for that year, it was produced the previous year. I experienced that with my 181... The lower the S/N for your 181, the better as the machinery is still generally new.
In the end, it doesn't particularly matter for you: yours is a 182 and is virtually identical to 181s through 186s, with the exception of the barrel twist rate. Yours is 1:10: same as my 181.
Hope this helps!
Welcome to the forum!