Latest News

Rental Protection Plan, 4D Reamer Rentals LTD

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.There are a lot of considerations when creating such a plan to help protect our clients from possible expenses.  So we surveyed clients to see what they wanted in a protection… Read more »

MEASURING FOR SCREW-IN CHOKES (Shotgun)

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,… Read more »

To Laugh or Not to Laugh, That is the Question.

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.”… Read more »

224 Valkrie Dimensions

224 Valkyrie Specifications Published

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… Read more »

P.O. Ackley

Ackley Category Added to the Site

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…. Read more »

Me Me, its all about Me

Why Are There NO Good Gunsmiths Around Here?

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… Read more »

Shot Show 2018

We are going to keep up on what we can do for our clients.  Always looking for new tools and items that we hope will serve your needs. During the Week of SHOT, we will be shipping.  Place your order today and it will Ship. Thanks for your business.

22 Rimfire Ammo

22 Long Rifle, so many Choices of Dimensions…

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… Read more »

Gunsmithing Student Handbook Series

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… Read more »

Over 1100 reamers in inventory!

More Tools, More Service…

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 dozen years we have owned it.  We plan to continue adding tools and services. Please check out the products we sell on top of the rental… Read more »

7.21 FireHawk, Lazzeroni

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.  It could push a 120 grain Barnes X at 3697 feet per second.  As well as a 140 grain at over 3500 fps. We picked up the reamer for this… Read more »