Hello everyone - New guy here. I'm from New Hampshire and retired. I informally target shoot at my local gun club and have been reloading for about 35 years.
Just started using a chronograph (Labradar), and when used in conjunction with Quick Load, it has me confused. The cartridge I'm shooting is 6mm TCU. A load of H335 with a 70 gn. bullet chronos at 3075 fps.
Quick Load predicts the velocity at 2914 fps with a chamber pressure of 52,434 psi. QL was adjusted for the actual shooting range ambient temperature of 68 deg F. I should also note that the bullet is not jammed.
If I adjust Quick Load Ba (burning rate factor) until the muzzle velocity is 3075 fps, the estimated chamber pressure when using the original powder charge becomes 63,154 psi.
Here's my question: Do you believe the actual chamber pressure is this high, or am I misinterpreting the QL information?
Just started using a chronograph (Labradar), and when used in conjunction with Quick Load, it has me confused. The cartridge I'm shooting is 6mm TCU. A load of H335 with a 70 gn. bullet chronos at 3075 fps.
Quick Load predicts the velocity at 2914 fps with a chamber pressure of 52,434 psi. QL was adjusted for the actual shooting range ambient temperature of 68 deg F. I should also note that the bullet is not jammed.
If I adjust Quick Load Ba (burning rate factor) until the muzzle velocity is 3075 fps, the estimated chamber pressure when using the original powder charge becomes 63,154 psi.
Here's my question: Do you believe the actual chamber pressure is this high, or am I misinterpreting the QL information?