Found them cheap on Palmetto Armory, looked them up in the manual and there was nothing there for 115 but the load data for 110 and 125 are nearly identical and the velocities are very close to 223 out of a 16 to 18" barrel. I figured why not, if a 223 is a very effective round with a 55 grain bullet one twice the weight at the same speed could be one great bullet. I'd much rather have my RFB in a self defense situation in my home than a shot gun loaded with these bullets. The weight of the gun the recoil would be very manageable, I'll wager you could bet 5 of these off before you could get 2, 12 ga in a pump gun with much greater accuracy. As easily shouldered as the RFB is, with 3x as many rounds and utterly deafening 308. Factor at these vols over penetration probably won't be a issue in a cinder block house this rifle and bullet weight could be the best home defense weapon you could reach for if your door gets kicked in by un invited guests. These will make great varmint rounds too since I have them 1 full grain under max. As stated 2850 will be plenty and the bullets are the same length as the 150 Serria Game Kings I'll be using for hunting, I don't see a accuracy issue.
I made a mistake on the powder it's IMI 3031, the fella who owns our LGS where I bought it (who after seeing my Burris on it when I picked it up ordered himself one) helped me out with the powder. If you go by the Lee Manual and use Varget you'll crush the end of the bullet before you can seat it to fit the mags. All of the lead in these is the bottom half, the top is just thick copper jacket.
For varmiting or If I'm going to be hunting open country and after a little research I picked up one of BPS new Oclus 4x16 side focusing scopes and will use a quick disconnect mount on it too. It's a good inch shorter than the Redfield or Leupold that make it ideal for this short rifle. It also has a lifetime warranty backed by BPS. Hopefully I'll never have to use it.