Thanks for putting that up. I looked at the 4-12x40 Tract rimfire scope but passed due to the 75 yard parallax. Just noticed the 3-9x40 Tract rimfire has a 50 yard parallax so I'm thinking this will be my next rimfire optic!
Don't get too hung up on parallax. When you plug data into a parallax calculator to get maximum parallax error, you'll see that it's of little consequence to anyone other than a serious or competition target shooter. You have to assume a horrible position to induce maximum parallax, so most of the time your error would be less than that shown on the table. For your stated purposes, the 75 yard fixed parallax would serve you better than 50. In fact, a fixed 150 yard parallax would serve you better than a fixed 50 once you start stretching things out.
https://www.lelandwest.com/parallax-error-calculator.cfm
