Using same bullet as you, I load IMR3031 to 25 grains; have done this load for years; and, probably will not ever try to "improve" upon it. My .30-30 is a Marlin 336 "beater"... A good read on this bullet is at https://www.artfulbullet.com/index.p...-strange.3850/ and here's one of my cartridge case labels: