I have several boxes of Safari grade 140 swift A-Frames loaded by Remington. Problem is the tolerances on my gun are too tight to shoot the nickel brass. Once loaded i have to shoot them to extratct but they shot very well out of my STW. I took a couple of bullets apart and the charge weights 74.5 to 74.6 but i cant tell what type of powder. Does anyone know..thnx