Barnes makes a semi spitzer bullet for the 45/70 which weighs 300 grs, i have used it in my 45/70 at 2200 fps and it works fine on whitetails, it is one of the original bullets that they still make which has a lead core and a jacket, the bullet comes in a couple of more weights, 350 and 400 gr. I am now using the bullet in my 458 SOCOM and it really works well. Take a look at this bullet, it will work for you...JimP.