Pilot Diameter Chart
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!
Sherman Wildcat Cartridges
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…
Do you have a print for that reamer?
There is a lot to learn about chamber prints.Ā We recommend the post on this blog. We are asked for reamer prints on a daily basis.Ā 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…
Understanding Headspace: Unlocking the Secrets for Safe and Accurate Shooting
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,…
Learn About Pilot Fit, It Matters!
Pilot Diameter is Crucial
After Market Pistol Barrels
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.Ā They were hardened by the maker to the point that only Carbide tooling could be used on them successfully.Ā We had clients…
What is chip welding?
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)…
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.Ā Below is a chart of the various chamber dimensions that are popular.Ā Yes, there are more than this, but this covers most of what people ask for. 22 Bentz is commonly used…
Fred talks about P.O. Ackley
One of the cool things about writing a book is that during the research for the book you learn a lot aboutĀ people. Ā 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…
Nosler Chamber Reamers & Gauges
Several years ago Nosler took nearly every caliber from 26 to 36 to SAAMI. Ā As soon as they were approved we bought all the reamers and gauges. Ā 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….