Handi rifle,
Sorry I do not know the twist rate on th Ruger #1 280, kindof embarrassed, I will look it up and reply to you tommorrow on the twist rate.
The MV is 2900, drop at 300 meters is 12".
I use a milldot scope and is zero at 100 meters...the holdover for example, at 300 meters is 1.2 mildots, @ 400 meters is 2 mildots.
Energy @2900fps @ 300 meters is approx 2019lbs.
Some say the recommende energy for Whitetail is around 1600lbs but I imagine everyone will argue that point till the cows come home.
Ok, before everyone asks...why a mildot scope...for me it simple and not complicatted as all my rifles have mildot scopes and that is what I am used to.