We at 4D Reamer Rentals LTD have long had requests for some kind of protection policy against the cost of broken, damaged or lost tools. Our clients are responsible people who understand that under the Rental Agreement they have reasonable obligations. This protection plan is one way to handle that obligation. There are a lot…
We often have clients ask about roughing reamers. We have never carried them because that would more than double our inventory costs and would not come close to paying for the expense. In 2025 Forster started offering a new batch of tools, “Piloted Roughing Drills”. They are offered in three (3) pilot size ranges. The…
Copyright 2019, Fred Zeglin, reprinted by permission of the author. These Charts come from Fred’s book, “Gunsmith Tools, Cutters, & Gauges – A Primer“. There is so much more in the book, check it out!
4D is proud to announce that we have made an exclusive deal with Tyler Jacobs, Owner of Sherman Wildcat Cartridges. We are now the exclusive source to rent proprietary reamers and headspace gauges for the entire Sherman lineup. While Fred Zeglin was working on the second edition of his Wildcat Cartridges book for Gun Digest…
Good News! We updated the 4D web site. This is a total overhaul and we believe it will make your shopping experience better than ever. One of the additions is a bump out for the Shopping cart when you add items to the cart, this makes keeping track of what is in your cart simpler….
There is a lot to learn about chamber prints. We recommend the post on this blog. We are asked for reamer prints on a daily basis. We have never provided them as they do not represent a specific tool. Prints are representative of what you would receive. Reamer makers like all machinists use tolerances when…
Updating this post from 2017: We now have over 2100 reamers and are still adding more tools all the time. Thanks for your continued business! ********************************* As of October 2017 4D Reamer Rentals LTD now has over 1100 reamers to serve your gunsmith rental needs. It’s pretty exciting how much this company has grown over the…
By Brady Kirkpatirick Introduction If you’re in the world of firearms, you’ve likely heard the term ‘headspace.’ But what is it, and why is it so vital? My name is Brady Kirkpatrick, the founder of GunMade.com, and I’ve spent years delving into the intricacies of firearms, including the concept of headspace. In the simplest terms,…
An Ebook that we sometimes send to clients to answer questions: Gunsmith Tools, Cutters & Gauges – A Primer We provide this book because it contains information from the four major reamer and gauge makers in the industry and more. We have no way of knowing the experience level of the customers we are working…
Pilot Diameter is Crucial
Stuart Otteson wrote two books about “The Bolt Action”, this is Volume I They are considered to be the go-to books for people who want the facts about modern bolt actions. Not only how they work but all the important engineering details. Stuart is a Mechanical Engineer by trade and he analyzed each action in…
January of 2023 we moved to Casper Wyoming. Dewain Zeglin has taken over the day to day operations of the company. Providing the same great customer service we have always offered. New shipping address is: 4D Reamer Rentals LTD 301 Thelma Dr., PMB 202 Casper, WY 82609 Want more details about 4D: Click Here
In early September 2022 Forster Products staff and owners put on an event for Distributors of their products along with other industry contacts. The facility for the event was “The Site, Firearms Training Center” in Mount Carrol, IL. Lead Instructors: Jim Kauber & Lara Spanic were great to work with and kept us all focused…
A client sent us the image below and asked if this came from us. It did not. Your account is managed by you on the web site, we will never send an email like this. Be safe out there!
Fall of 2020 issue of the “One Good Shot”, association President Art Lamontagne wrote about our services here at 4D. Art ordered the reamer on his own nickle and we did not know about his affiliation with the organization. [gview file=”https://4drentals.com/wp-content/uploads/2020/11/TCA_fall2020.pdf”]
Our customer, Cody Smith wrote about his experience working with Forcing Cone tools in his revolver. It’s probably faster to download the file than waiting for it to load in the browser. [gview file=”https://4drentals.com/wp-content/uploads/2020/09/BPC_Fall_20lr.pdf”]
Serman L. Mays a stock maker with more than 40 years of hands on experience making, finishing and checkering stocks decided a few years back to write a couple of books to help noobs (New Bees) get started in the trade with fewer mistakes and faster success. His book on stock making is one result…
Being in the gun business for almost 40 years now I have become acutely aware if the lack of basics being taught in schools. In particular in Occupational Trades institutions. Before you send me a nasty gram defending your favorite school keep in mind I teach at one of these colleges and have friends at…
We recently put “Checkering, a book of checkering for the beginner” Back in print. This popular book deserved a second printing, so we did just that. It’s already on Amazon, on our site and soon will be in the hands of other book sellers. Just as the title indicates, this is a book that you can…
We stock Forster Headspace gauges for sale.
In 2018 a new condition became obvious to us here at 4D Reamer Rentals LTD. In the past we saw certain reamers receive damage because of aftermarket cylinders out of Russia or China. They were hardened by the maker to the point that only Carbide tooling could be used on them successfully. We had clients…
This week I really had to laugh! First, I had a client accuse us of using fine print, “the tool of Lawyers everywhere”! or something like that? Next complaint from a different client, “You don’t spell it out clearly enough!” Bottom line, you can’t please everyone, or at least this week, we can’t please anyone… …
The Chamber reamers that we carry at 4D Reamer Rentals LTD are all High Speed Steel (HSS). When we inspect reamers upon return from rental we look for a few things. Obvious damage of any kind. (dings, chips, modifications, burns, rounded edges to name a few) Dirt/metal chips from the reaming process Oil (in excess)…
Before accepting a barrel for machining to accept screw-in chokes, you must measure the outside diameter (O.D.) to determine if there will be sufficient wall thickness after machining. “Mike” the O.D. of the barrel and the O.D. of the tap for the particular gauge. Subtract the O.D. of the tap from that of the barrel,…
You hear some things on the phone that really make you laugh when you rent tools. They might not be funny to the average tool user but maybe we need to share them to clear up some misunderstandings? One of my favorites is, “That barrel has been in the lathe forever waiting for the reamer.”…
SAAMI Publishes Approved 224 Valkyrie Cartridge Specifications March 27, 2018 – The Sporting Arms and Ammunition Manufacturers’ Institute (SAAMI) voted to approve the Federal Premium 224 Valkyrie as an official new cartridge during their committee meeting at the 2018 SHOT Show in Las Vegas, Nevada this past January. 224 Valkyrie’s SAAMI standards documents are now…
We have seen a ton of demand for Ackley calibers since the publication of Fred Zeglin’s two new books in 2017. For this reason we have created a category on the 4D web site to separate out all Ackley cartridges making them easier to find. They still appear in the standard caliber listings as well….
Diplock’s Syndrome For those of you who have not read Fred Zeglin’s book on Wildcat Cartridges, here is a little excerpt you might find amusing. “Diplock’s Syndrome,”  a syndrome contracted by gunsmiths. The cause is close contact with clients or customers who lack patience, and often what we used to call common courtesy. Custom guns are hand…
For those of you who love the 22 LR, you know there is a wide variety of ammo and chamberings for this cartridge. Below is a chart of the various chamber dimensions that are popular. Yes, there are more than this, but this covers most of what people ask for. 22 Bentz is commonly used…
Fred Zeglin released two titles in his new series of instructional books for anyone who wants to understand how guns work. Tailored to students of gunsmithing, whether you are a hobbyist or a professional Zeglin bring over 3 decades of gunsmithing and teaching to the table. These books are clear and concise detailing specific subjects. Lee…
Designed by John Lazzeroni and introduced in 1996. This 7mm cartridge was dropped from the Lazzeroni line in 1999 when the 7.21 Firebird came out. Â It could push a 120 grain Barnes X at 3697 feet per second. Â As well as a 140 grain at over 3500 fps. We picked up the reamer for this…
Art of the Gun @Â Mitchell Museum in Trinidad Colorado was held the weekend of June 9-10, 2017. Â This event was held in conjunction with the 70/40 Anniversary of the TSJC Gunsmithing Program. Â 70 years ago P.O. Ackley helped start the first gunsmithing program at any college in the U.S. 40 years ago the School joined…
One of the cool things about writing a book is that during the research for the book you learn a lot about people.  I was able to interview a number of interesting and well known folks in the gun world while researching P.O. Ackley, America’s Gunsmith. If you would like a little more behind the scene…
Several years ago Nosler took nearly every caliber from 26 to 36 to SAAMI. Â As soon as they were approved we bought all the reamers and gauges. Â The 26 and 28 Nosler are the only cartridges that share the same headspace gauges in the Nosler factory line-up, all the others have their own specific gauges….
Part II If there are times when using brass to gauge headspace is OK then there must be times when it’s a bad idea.  High intensity cartridges Wildcat cartridges Ackley Improved cartridges High intensity cartridges run from 47,000 PSI to 65,000 PSI. A high intensity cartridge with a little headspace can cause all kinds of…
Part I We talk to hundreds of gunsmith’s each month. It surprises me how often these “professionals” decide not to use a headspace gauge when they are available to them. They say, “No, that’s OK I will just use brass.” The reason that we are still using brass cases in firearms after more than a…
I doubt that P.O. Ackley set out to be famous. Â But life has it’s twists and turns, Ackley worked hard to learn his trade and equally as hard at putting out the word about his work. Â He became acquainted with many gun writers and leaders in the gun industry. In 1936 he made the decision…
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