does fast burning powder develop more psi than slow burning powder in same caliber and bullet weight?
No...it is measured.Hunter2506 said:Thank you Ridgerunner665.
is there a way to calculate psi or is it measured?
I'm saying faster powders release it (the energy) faster...the faster a powder burns, the more the pressure builds before the bullet has time to move.Pegasus said:Are you saying that fast powders have more chemical energy grain for grain as compared to slow powders?
With the same charge weight...the faster powder will always have a higher peak pressure.Thren68 said:I'll agree that fast powders hit their energy curve sooner. However, I wouldn't want to definatively say that faster powders = a GREATER pressure curve.
Everybody is missing my point or I'm not making clearly...not sure which.Gohon said:Of course 8 grains of Bullseye could be harmful to the gun and shooter in a 45 ACP because it is a over load. One can accomplish the same thing with just about any powder whether fast or slow burning.
I understood what you were saying and I think most did. You are correct that grain for grain a fast powder should read higher in psi. My point was the OP was asking about using the same caliber and bullet weight and if faster powder would be at a higher psi than slower powder. My answer was it would not, as long as load guidelines were used to reach the same velocity from each powder. Naturally it should take less fast powder (fewer grains) than slow powder in a short barrel firearm to reach the same velocity but pressure should be about the same from each load if held within guidelines for the same caliber and bullet weight. I didn't think he was asking about a grain for grain comparison but maybe I misunderstood his question.The 8 grains comparison was a comparison of pressure per grain of powder...no slower powder is going to produce that pressure with an 8 grain charge.
Ridgerunner couched his statements very well.Gohon said:In that case Ridgerunner is absolutely correct in his answer to your question...........
Pegasus, is that a higher peak pressure or a faster peak pressure? I thought slow powders would reach pretty much the same peak pressure but just farther down the curve. I also thought that was the reason for going to a slow powder when shooting pistol cartridges in a rifle instead of the normally recommended pistol powders.