In .50 caliber the 48" twist is not ideal for either ball or bullet but will do OK for balls and short conical bullets. For long range work, and I call 300 yards long range, I think you'd do much better with the Gibbs. The short, fat .50 caliber conicals suitable for a 48" twist are good for hunting within 150 yards. They are not very aerodynamic, loose velocity quickly and are very sensitive to wind, not good bullets for precision shooting much past 100 yards. Some people have built pretty good midrange rifles by just putting a Green Mountain fast twist .45 caliber barrel on a Lyman or T/C rifle and adding good sights.