Re: Reloading question
Longer bullets require a faster twist to stabilize than shorter ones.
Longer bullets also encroach further into the case, which reduces the capacity, assuming the same overall length.
The longer bullets also have more bearing surface which equals more friction, increasing pressures.
Longer (heavier) bullets also take longer to get moving (inertia), so a slower burning powder gives the bullet a chance to get moving before reaching peak pressure.
If an equal charge of the same powder was used for a 190 SMK as say a 168 SMK, then the pressure of the 190 would be much higher.
Bullets are designed for a specific purpose. Some rifle and bullet combinations work better than others. If two bullets of the same caliber and weight, but differing lengths, were used the longer (more aerodynamic, ie higher ballistic coefficient) bullet would be less affected by wind drift and (assuming the same muzzle velocity) would drop less than the shorter bullet. The increased BC really shows itself as the distance to your target increases. If you are only shooting at shorter ranges, 200 meters or so, then the BC has much less impact as the time of flight is short.
So no, there is nothing wrong with using longer bullets. You pick the load and bullet that will perform for your intended use and test to ensure acceptable accuracy.
