Probably you entered the wrong Ica, you have to figure from the advertised specs, NOT the .050s
124 is closer to the truth with the stock specs
Don't forget to enter your elevation, to get your corrected Dcr.
Actually, if you go to the Dynamic calc page, there’s a ‘V/P Index Calculation’ icon below the fill in boxes, click that and go way down the page and below a chart is ‘their’ 340 example at 269 V/P. I used ‘their’ ICA, comp, etc.