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Reference & Downloads

These posts include reference materials I’ve created and find myself using frequently, as well as free downloads.

2017 PRS Match Schedule

2017 PRS Match Schedule

Here is the tentative schedule for the upcoming 2017 Precision Rifle Series (PRS) point race events. Some of these details were posted on Facebook a few weeks ago, but the link expired … and the match details haven’t all been uploaded on PrecisionRifleSeries.com yet. So I ask Shawn Wiseman, the PRS Director, for the latest list, because I wanted to pencil in a few dates on my calendar. I’m sure they’ll have all the event details uploaded on this PRS website very soon, but I thought a few of you guys might appreciate having this for reference. The 2017 schedule shows ...

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PRB Interview in Outdoor Life

Cal Zant Outdoor Life Interview

The recent August issue of Outdoor Life featured a Q&A session I had with their gun editor, John Snow. I wanted to share that here with you guys, and OL kindly gave me permission to do that. So here’s what John wrote: Lifelong hunter and gun enthusiast Cal Zant tapped into his engineering background to create PrecisionRifleBlog.com, one of the most informative sources for shooters on the web. OL: How did you get involved in the outdoors? CZ: I grew up in West Texas and have been around guns my whole live. I don’t even know how old I was when I ...

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How Do Rangefinders Work?

By understanding how rangefinders work, you’ll be able to employ them more skillfully in the field. This article should equip you with the fundamental principles. Laser rangefinders (LRF) all work using the same basic concept. The rangefinder emits laser beams at the push of a button. Those beams bounce off distant objects and the rangefinder’s high-speed clock measures the total time it took from when the beams left the unit until they returned. Since we know how fast the beam was traveling (speed of light) the unit can simply use that time measurement to calculate the distance it traveled, and ...

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Secrets of the Houston Warehouse – Lessons In Extreme Rifle Accuracy

Back in 1993, Precision Shooting Magazine printed a landmark article about the findings of a group of benchrest shooters who turned a huge Houston warehouse into a precision shooting laboratory. The warehouse, owned by Virgil King, included a 325 yard long straight-away through the heart of it, which provided an ideal shooting environment where the breezes never blew, the mirage never shimmered, the sun never set and the rain never fell. So began the most insightful, revealing experimentation into practical rifle accuracy ever conducted. Over a period of six years, the levels of accuracy achieved in the Houston Warehouse went ...

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What Is The Precision Rifle Series?

The Precision Rifle Series (PRS) is a championship style point series race based on the best precision rifle matches nationwide. Scores from multiple matches are tracked throughout the year to rank shooters from across the nation. Most PRS matches are derived from a practical, tactical, or sniper competition format with targets up to 1200 yards away. While a few matches may require contestants to use multiple weapons, the primary focus of PRS matches is on long range rifle engagements. PRS matches are recognized as the major league of shooting matches, offering the most challenging and competitive events and draw the best shooters ...

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MIL vs MOA: An Objective Comparison

MIL vs MOA Comparison Article

There are a lot of articles and forum threads out there comparing MIL and MOA, but most either aren’t objective or they’re overly complex. I’ll try to avoid both of those pitfalls in this article. Executive Summary A few months ago I asked Bryan Litz whether he personally used MIL or MOA. Bryan is an expert among experts in the shooting community, and after reading his books I’ve gained a respect for his scientific approach to decisions like this. His response was so concise and objective, I thought it could serve as the executive summary for this whole comparison: “You ...

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Rifle Screw Torque Settings Guidelines

I’ve had to reference back to these torque specifications a couple times, and thought it’d be helpful to post. It is a list of the recommended screw torque settings for most rifle parts, like action screw torque. These come from a lot of different sources (including manufacturers on the phone), but one great one is Brownell’s “Torque Specifications for Gunsmiths” Article.  As that article explains, these specs are subject to change as companies change their manufacturing processes, materials, and design.  However, many people believe consistent torque is at least as important as the actual number of inch/pounds (especially when talking about action screws).  Here is an excerpt from that article that ...

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Oehler 35P Chronograph Manual

Oehler Research definitely makes the best chronographs in the industry … hands down, no argument.  I had a chance to talk with Ken Oehler at the 2013 SHOT Show, and have to say it was one of the most enjoyable conversations I’ve ever had with someone regarding ballistics.  Ken knows his stuff, and is an expert among experts in shooting sports.  I’ve used an Oehler 35P, which is the pro-sumer grade model they offer (i.e. model targeted at professionals or high-end consumers) and can say they are a joy to use … and VERY accurate.  You get very few errors and ...

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Detachable Magazine Dimensions & Max COAL

The table below contains the maximum Cartridge Overall Length (COAL) for popular detachable magazines for rifles.  This is important to consider when picking a rifle cartridge to ensure you have enough clearance to “chase the lands”, which just means as your chamber throat begins to naturally erode from use you seat your bullet further and further out so that it maintains the same relative position with the rifle lands.  Many people start with their COAL almost maxed out in their magazine, and as their chamber throat starts to wear they are forced to choose between loss of accuracy from not ...

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Portable Reloading Press Plans

I wanted to create a portable reloading press stand that I could mount my full-size RCBS Rockchucker Press or smaller RCBS Partner Press to.  The plans I came up with were simple to build, used easy to find materials, and the finished product has worked exactly like I was hoping.  The stand is very strong and stiff, which is critical when designing a reloading press mount.  It is ergonomic and natural to use on either a table top or a work bench surface.  I just use one or two Irwin Quick-Grip Clamps to hold it securely to the surface.  The stand has “window cutouts” ...

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