2-barrel
If you are saying chamber pressre must be higher there is a difference of powder pressure curves that also must be accounted for. I do not pretend complete knowldge of all the formulas, but I believe if you only consider mass and velocity without accounting for variables in the acceleration due to different powders you may not have the whole picture. You note acceleration in your set-up, but how are you measuring it ? It is a curve not a straightline.
We typically measure peak chamber pressure because that is doable and most powder burns in the first
I do not disagree the smaller bores typically develop greater pressure on average and therefore potentially misshapen more pellets than the larger bore.
The effect is not huge, but definitely definable between gauges. Though the difference when firing the same shot load is not nearly as great as when you use the normally different load weights for a given gauge ( yes I know that is obvious)
I do not think the potentially lower pressure of firing 1oz out of a 12 vs a 28 gets you a greatly different 2D pattern given similar choke profiles, wads, hardness of shot, etc.
Last edited by old colonel; 06/05/16 11:06 PM.
