Thread: Calculating pressures in hand loads

Originally Posted by 7RMBoy

Cheers grandpamac,

Great reply. Have just loaded my first batch of reloads ranging from Noslers minimum to their maximum to try get a feel for which amount of powder works best. The question more originated from seeing something about seating depths affecting chamber pressures.

Greetings Again 7RMBoy,
Yes seating the projectile closer to the rifling does increase pressures and velocity slightly. The greatest effect is with cartridges like the Weatherby magnums that usually have a free bored chamber (long way to the rifling). I usually start with the projectile seated 1mm from the rifling, where I can, and have seldom needed to change that. Barnes projectiles need to be seated at least 1.25 mm (0.050 inches) from the rifling and further often works best. I doubt if you will have any problems unless you set the projectiles hard into the rifling and probably not even then.
Regards Grandpamac.