Don't know much about vintage ammo.. but if it dates from 1941, I wouldn't shoot it. Worth something.
If you want ballistics for modern bullets and powder, let me know what you're shooting and I can provide a ballistics chart. Most of us reload 303 Savage ammo up to 30-30 standards using 30-30 bullets, and so the ballistics will be right on with the 30-30. Can't find good hunting 190gr jacketed bullets any more, but the 170gr work very well.
