I have a few dozen rifles chambered in 250-3000. It is a good cartridge, about the same as the 243 performance wise when using comparable bullets.
Most of the 250-3000 rifles older than 50 years have a 1-14" ROT which limits the length/weight of bullets that will stabilize, but most newer rifles, except for the 1986/87 Winchester/USRA 70 Lightweight Carbine, have a 1-10" ROT and will accommodate most any weight/length of .257" component bullet.
The Remington 700 Classic in 250-3000 came with a 24" barrel, so you should be able to squeeze all the velocity that is possible at safe working pressures.
I only have one Remington chambered in 250-3000, a Model Seven with a 700 Classic barrel that was trimmed back to 21" and is part of a matched pair, the other having a 700 Classic barrel in 300 Savage.
Do you still have Kohler’s Model 20?
