Ian
Notorious member
Take a look at these QuickLOAD predictions for .38 Special, with three different powders, with charge weights adjusted to achieve similar PEAK pressures, at around 80% of maximum allowable peak pressure.
Note that on one particular relative burn rate chart, Bullseye is listed as #10 and Clays occupies the #31 slot, while Titegroup sits at #26. Does that jive with this? I think not.
Less than 98% of the Bullseye burned in a 5" barrel, and it has a muzzle pressure of 3710 psi.
Clays is all done in the first inch, with only 1988 psi muzzle pressure. Bet it will be quieter!
Now Titegroup is all burned in around 2.3", with a muzzle pressure of 2637 psi.
Interesting, and this explains to me why Bullseye has always been loud and dirty in a .38 revolver.
Also note that Pmax is reached in less than half an inch of bullet travel, while the base band of the bullet is still in the cylinder throat.
Note that on one particular relative burn rate chart, Bullseye is listed as #10 and Clays occupies the #31 slot, while Titegroup sits at #26. Does that jive with this? I think not.
Less than 98% of the Bullseye burned in a 5" barrel, and it has a muzzle pressure of 3710 psi.
Clays is all done in the first inch, with only 1988 psi muzzle pressure. Bet it will be quieter!
Now Titegroup is all burned in around 2.3", with a muzzle pressure of 2637 psi.
Interesting, and this explains to me why Bullseye has always been loud and dirty in a .38 revolver.
Also note that Pmax is reached in less than half an inch of bullet travel, while the base band of the bullet is still in the cylinder throat.