Tight neck" chamber you may have already found the problem
It occupies less space for the situation and maintains a strategic distance from the over-pressure that could somehow break the expelled powder's grain structure; broken grains of powder will have an alternate consume rate and can radically influence speeds, tensions and exactness. Include the way that I for one love the manner in which the circular powders act in a powder hurler or computerized gadget, and you can comprehend the reason why I'm captivated with them. The Vihtavouri line of powders is the one I have minimal measure of involvement in, however what I have utilized, I preferred. Vihtavouri is essential for the Norwegian NAMMO Group, which incorporates Lapua and presently Berger Bullets. They have three series of powders, the N100 series for rounds, N300 for guns and shotshells, and the N500 series is what Vihtavouri calls its High Energy series for upgraded downrange execution. I have a few companions who've had great outcomes with Vihtavouri powders, givi...