I recently encountered a problem using a new powder. The gun is a 9mm (Tanfoglio) and the boolit is a 125gr spitzer. Barrel is slugged at .356 and my boolits are sizet .357. Due to increase in transport costs powder here has become quite expensive, so I wanted to try some cheaper powder. I bought a pound of Vectan AS. It's burn rate is equal to Red Dot.
My load is as follows:
Wheel Weights - air cooled
Magtech SP primer
Vectan AS - 3.3gr
Velocity - 1020fps
I get HORRIBLE leading (thank God for Chore Boy) and some of the boolits tumble in flight. I have shot thousands of thousands of this boolit using Vithavouri N320/3.6gr @ 1000fps and never had a problem with leading or tumbling. I use my own lube which I know works and use only a very light taper crimp. I'm an IPSC shooter so reducing velocity is not an option as my loads needs to be power factor 125.
What could be the reason for my problems? Do I get leading because this powder is faster?? And if so, would waterdropping help me? Wheel weights should be sufficient for 1000fps, so my guess is the problem is the powder....
What do you guys think?