The Original RPG
Rim & Primer Gauge
Welcome to RHP
Welcome to Rabbit Hole Precision! Home of the world’s first rim thickness gauge for centerfire rifle cartridges. Looking for more consistent ignition from your precision handloads? Look no further than here to get the most consistent primer seating and accurate readings using our new “RPG” tool. Treat yourself to the finest rim & primer gauge ever made, give yourself that edge over the competition and Go for the Gold!
We are a small privately owned business located in Hustisford, Wisconsin and actively competitive in the F-Class community. We serve the needs of top benchrest, f-class, PRS, ELR & ULR shooters all over the world with our patented innovative designs and technology through extensive research and development: from the reloading bench to real-world application.
The Original RPG
The RPG is our bread and butter, and the first of all great things to come. This tool is the World’s First Rim Thickness Gauge for centerfire rifle cartridges. Using this tool to sort brass by rim thickness will allow you to get the most uniform primer seating you have ever experienced with using any micro adjust primer seater (handheld or benchtop).
With a simple switch of Adaptor Plates, the same tool can be used for precise measurements of: rim thickness, primer pocket depth, seated primer depth, rim-to-pocket depth, rim-to-seated-primer, primer height on granite surface plate, and firing pin protrusion.
There are 3 Types of Adapter Plates: Rim, Case Head, and Primer Plates. The Rim and Case Head Plates are specific in size to bolt face diameter, are sold in sets and available in 9 Sizes. The Primer Plates are needed for measuring seated primers, primer pocket depth, and more.
About Us
Our mission here at Rabbit Hole Precision is to create the most accurate, repeatable and efficient tools machined to the highest standards from the most premium materials that will offer the end user a true favorite tool.
There are still some holes in the market in the aspect of precision handloading that are areas that haven’t been developed or thought of yet. We believe that many manufacturers do not pursue certain areas that cater to a small clique market. We see that small clique market as our main customer base for all their highly specialized needs helping them get that final edge to becoming the next champion.
We watch what tools are on the market to see the pros & cons of all the different designs to improvise on what would be the most ideal design. From there, we get out our drawing board and get to work by testing different design ideas to find what will be the very best without going well beyond overboard on cost. Then put that idea into a prototype to start field testing it and making small changes & improvements to fine tune it into a work of art that will be simple & pleasurable to use.
We hope that you will enjoy a lifetime of use from our products and will allow us to serve you for all of your needs in the products that we have to offer.
Customer Feedback
Awesome customer service!
Machining: A++
Presentation: A++
Packaging: A++
Haven’t used it yet; need to buy a dedicated gauge for it. Will then sit down and sort all my cases into group sizes ready for the next round of priming. I have a Primal Rights CPS so will be able to ‘crush’ the primers to the right depth. I use Lapua for everything so I can stop uniforming the pockets now and just measure everything instead. Great tool Justin. I’m sure once word gets around(if it hasn’t already) you’ll have to get...
Read MoreNice work, thank you.
Fantastically machined and packaged. Only started using but am extremely pleased thus far. Everything about the Master Kit is first class and Justin has been great to deal with: fast email replies, great customer service and fast shipping.
This tool is very good quality and works as advertised. I am still waiting on my Mitutoyo digital indicator to arrive but I did try it out with another brand indicator that fit and it worked just fine.
I have been looking for a way to measure case rim thicknesses and this tool makes it possible, plus all of the other measurements that are possible with this tool.
Thanks for a great tool.
Delivered timely & in good condition Assembled it with the rim thickness plate etc for .308 just to get familiar taking measurements. I’m thinking I may need to order another unit so I wont need to do as many set ups for other measurements out of convenience Looking forward to using it & getting more consistencies with primers & brass. Thanks!
Works great, wanted to measure primers quickly, and it does that very well with granite surface plate. Could not be happier. Thank You for making this product.
Great job! Fast shipping quality product. Very impressed. Thank you. I wish you all the best in your future business!
Excellent. Tried it out for rim thickness only last night. Love it. Will get into the other features when I get time.
Great tool,easy to make accurate measurements. I have yet to shoot any brass measured. I am sorting a 250 pieces of brass to test. I have 1800 to sort after I test.
Wonderful tool, well implemented. Thank you.
Delivery & Returns
We have partnered with USPS and will provide a Tracking Number with every order.
It is the Customer’s Responsibility to order the correct size Adapter Plates.
Rabbit Hole Precision, LLC has a ZERO Return Policy. Defective units will be replaced.