RUMLUVER
Bigbrother pretty much said what there is to know about the Tomahawks. If you look at the ballistics there isn’t much difference. The main reason I went with them in both cases was that I was rebarreling anyway and wanted something different. That’s about what you get. My 300 Tomahawk shot 240 SMK’s at 3010 fps out of the 30” Lilja. I could go faster but that’s where my accuracy was
I also shoot 190 SMK’s at 3306fps with good accuracy. Once again I could go faster but the accuracy was not there, so what good is the increased powder capacity. I also have a 300 RUM with a 26” barrel that will shoot 178 gr A-Max’s at 3129. And that’s seems to be a real good load for that gun. You don’t realize any great difference shooting up to about 800 yds. With the criteria that you set, I certainly would stick to the 300 RUM. They are great cartridges and appear to shoot a variety of bullets well. You didn’t say if you shoot hand loads or not, nor did you say what kind of game you were pursuing. In either case the standard RUM’s have more than enough horsepower to get the job done on deer and elk. The modified cases are certainly not necessary but if you like to tinker that’s also an option. Custom barrels typically shoot better and the longer the distance the easier that is to see. But the barrel is only part of the equation; it still takes lots of practice plus good reloading skills. Wind plays a big factor in the long range game and a 30 caliber 190 SMK bullet traveling at 3100fps drifts just as much shot from a 300 RUM as it does from a 300 Tomahawk. Hope this help[s.