![]() You can see that regardless of the shooter, order the shots were fired in, or the specific load used, there appears to be a sweet spot around 0.060” of bullet jump, because all of the lines on the chart appear to flatten out near that area. Here is a visual that illustrates what we’re looking for, which is the big green area that provides both very good precision AND is also very forgiving in terms of bullet jump/seating depth. That means the rifle would be more consistent from the start of the match to the end of it or could shoot a particular kind of match-grade factory ammo really well for a longer period of time. We are looking for the window of bullet jumps that would continue to have a similar point of impact over 200+ rounds, without having to adjust the seating depth as the lands of the barrel erode. ![]() smallest possible group), but was focused on finding the best precision over a range bullet jumps. I carefully explained the testing methods and data/charts in the last post and won’t be repeating that info again here.įundamentally, this research wasn’t focused on finding the specific bullet jump that provides the absolute best precision (i.e. If you missed the previous post, I’d strongly recommend you start there – or this simply won’t make sense. In this post, I’ll share more research data Mark has collected related to bullet jumps for two popular bullets used for long range: It also provides an overview of the test methods and how to interpret the results. Hybrid bullet over 10 different rifle/load configurations. This article introduced some interesting, new research conducted by Mark Gordon of Short Action Customs on what the most forgiving range of bullet jumps are for the Berger 105 gr. It also covers how many shooters manage seating depth and bullet jump over the life of the barrel. This article focuses on how quickly the lands of a rifle barrel usually erode, especially for mid-sized cartridges that are popular in precision rifle matches. It also lays a foundation of what we mean by bullet jump, freebore, etc. ![]() This article provides a comprehensive overview of what most professionally published books and reloading manuals suggest about bullet jump and seating depth when it comes to precision rifles.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |