Pressure difference betwen Swiss and Goex

[GREENSWLDE]

Oldhunter1954
To answer your question;
The chronograph I now use is a Labradar. It sits beside the machine rest and records the shots beautifully. The other chronographs I used required setting up quite a few yards from the muzzle to eliminate the errors caused by patches flying through the screens. They also missed recording too many shots. Yes, the Labradar will occasionally not record a shot but it is far superior to the other chronographs I have used.

My Labradors were Always heads up counting shots. Very distainful look when I missed...
OLD DOG..

 

[Okie Hog]

In the October, 2007 Rifleman magazine is an article that compared the pressures and velocities of black powder and the substitutes.

Fired from a 27" barrel, 100 grains of Goex 2F gave a velocity of 1,647 fps and a pressure of 10,100 psi.

Fired from a 27" barrel, 100 grains of Swiss 2F gave a velocity of 1,879 fps and a pressure of 14,600 psi.