A Data-Driven Approach To Precision Rifles, Optics & Gear

About Cal

Cal Zant is the shooter/author behind PrecisionRifleBlog.com. Cal is a life-long learner, and loves to help others get into this sport he's so passionate about. Cal has an engineering background, unique data-driven approach, and the ability to present technical information in an unbiased and straight-forward fashion. For more info, check out PrecisionRifleBlog.com/About.

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Bullet Jump Load Development

Bullet Jump: Is Less Always Better?

This landmark article shares new, primary research that Mark Gordon from Short Action Customs has compiled over the past 2 years. He tested a wide range of bullet jumps in several rifle/load configurations, and this post shares the analysis of that data. Mark used a similar approach to the Audette Ladder Test and OCW method, but the goal was to not find the most forgiving powder charge weight, but the most forgiving bullet jump. He wasn’t looking for the specific bullet jump that grouped the best, but the largest window of bullet jumps that provided a similar point of impact. 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. Mark’s findings may seem counter to conventional wisdom when it comes to bullet jump, but a few national-level precision rifle competitors also support the idea, which I highlight in this post as well.


  1. Hi from Australia,

    I hope this post finds you well.

    My father-in-law is a competitive long range shooter here in Victoria, Australia. He is looking to purchase a Warner Rear Sight – (clockwise adjusting I believe). We’ve looked far and wide here in Australia, and we have some feelers out with a couple of Australian Rifle associations in several states, but no luck so far. They seem to be rather hard to acquire. Would anyone know where a we might be able to find a clockwise adjusting Warner Rear Sight?? Happy to consider second hand provided it meets his requirements. Looking forward to any insight that may be provided.



    • Marty, I’m afraid I don’t have any advice for you here. I’d suggest contacting Warner Tool directly and I bet those guys might be able to point you in the right direction. I’ve worked with those guys a little, and they are very friendly and helpful.


  2. Hello Martyn,
    Hope all is well down under. I have just listed a Warner #1 Euro on the Accurate Shooter web sight.
    You might want to check it out. The sight is in excellent condition even though it’s used. Good shooting!
    Good luck.

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