There are also two different rifling twists in 250-3000 Savages, one is 1/12", and the other is 1/10". IF your rifle is a 1/12", it is more limited in the weights of bullets it will handle well. I don't think the 1/12" barrels will handle pointed bullets of much over 100 grains with accuracy, while the 1/10" barrels will handle most all .257" diameter bullets well.

The .250-3000, (or ".250 Savage") was designed by Charles Newton in the early days of the 20th Century, and was almost 50 years ahead of its time, since the best powders for it didn't come along until after WWII!

All in all, it is a great round, and the AI version is probably the best of all .25 caliber cartridges!