How Shooting Affects Your Hearing

How Shooting Affects Your Hearing, an info graphic from The Smoking Barrel USA:

How Shooting Affects Your Hearing
Source: The Smoking Barrel USA

Allied Machine AccuPort 432 and AccuThread 856 Kits

Allied Machine & Engineering has expanded its AccuPort 432 and AccuThread 856 program to include more than 120 kits for manufacturing hydraulic ports and manifolds. The kits are now available to meet SAE J1926; ISO I6149; John Deere G1731; and SAE AS5202 (aerospace standard/Mil-Spec) specifications.

AccuPort PR Image 1

Contained in each kit is everything necessary to cut and finish the port, including an AccuPort 432 Port Contour Cutter, T-A or GEN2 T-A pilot insert(s), port form inserts, and an AccuThread 856 threadmill. Kits have a 5 day lead time if not in stock.

The J1926 and I6149 specification kits are ideal for heavy equipment applications, and are available in both metric and imperial shanks for both ferrous and non-ferrous applications. The G1731 specification with a metric shank is designed for cast iron applications, and the AS5202 comes with an imperial shank for both ferrous and non-ferrous applications.

The AccuPort 432 Port Contour Cutters enable users to drill and finish port forms in one operation. Produced to strict manufacturing tolerances that meet each specification’s finish tolerances, the patented design is ideal for ports and stud ends with straight threads and o-ring sealing. The AccuPort 432 eliminates the need for pre-drilling and allows for efficient set-up and production time. The replaceable insert design eliminates regrinding and resetting.

The AccuThread 856 provides superior thread forms when compared to other thread mills and taps. Allied’s proprietary AM210® coating provides a 25-50 percent increase in tool life over other competitive options. With a thicker core and helical flute, AccuThread 856 solid carbide threadmills offer increased strength and rigidity when cutting forces are applied. Standard cutting lengths permit multiple applications without special thread mills.

Award-Winning Powder Metal Parts

The Metal Powder Industries Federation is a federation of six trade associations representing various aspects of powder metallurgy (PM), metal powders, and particulate materials with a mission of advancing the interests of the metal powder producing and consuming industries.

Winners of the 2017 Powder Metallurgy (PM) Design Excellence Awards Competition, sponsored by MPIF were announced at the POWDERMET2017 International Conference on Powder Metallurgy & Particulate Materials. Receiving grand prizes and awards of distinction, the winning parts are outstanding examples of powder metallurgy’s precision, performance, complexity, economy, innovation, and sustainability. The winning parts show how customers from around the world are taking advantage of PM’s remarkable design advantages.

An Award of Distinction in the Aerospace/Military Category was earned by ARC Group Worldwide, Longmont, Colorado, for a metal injection molded (MIM) latch made from MIM-4140 low-alloy steel for Sig Sauer Inc. The internal latch drives a subassembly for the telescoping feature of the collapsible stock on MCX and MPX rifles. The part was designed for metal injection molding as it could not be economically made using any other fabrication method.

An Award of Distinction in the Hand Tools/Recreation Category went to Indo-MIM Pvt. Ltd., India, for a set of metal injection molded (MIM) parts—barrel block, gas block, bolt catch, 7.62 NATO mag conversion bar, ejector retainer, and extractor link—that go into an MDR rifle made by Deserttech. The MIM-designed parts replaced ones that were machined, and reduced the cost by 30% while manufacturing lead-time was cut in half. MIM is one of the PM-based technologies, that forms metal powders into precision components used in applications such as auto engines and transmissions, hardware, industrial machinery, sporting goods, defense, and firearms.

New Books from Paul Mazan

From author Paul Mazan.

I have two new books that have just been listed on Both are available in Paperback and Kindle versions.

The first is “American Odyssey” and tells the Story of my Grandfather’s immigration from Poland to The U.S and covers his experience as an immigrant and in WW1. It is a tribute to all the people from all over the world that left their old lives and experienced passing through Ellis Island, Learning the Language while living with family and working menial jobs just to become Americans and secure a future for their children. It also follows him through the chaos of the first months of the War when we were unprepared, the trip to France with the first contingent of American troops , Training and introduction to trench warfare. He experiences the fear of death the painful exposure to Mustard Gas and being wounded.

The second book, “Chicago Rhapsody” is the first in a series of a smart mouth Private Detective who manages to fail at everything he tries until he becomes a cop. Along the way he picks up a K-9 partner who is his equally independent alter ego. If you like snappy dialog, funny situations, shoot outs, and a bit of mystery I think you will find this one right up your dark alley.

Allied Machine TECMA demonstration

Allied Machine Offers Original T-A® Drill at TECMA 2017

Visit Booth 1060 to see how to reduce downtime and lower cost per hole

Dover, OH – Allied Machine & Engineering, a leading manufacturer of holemaking and finishing tooling systems, will highlight its line of replaceable tip Original T-A® drill systems at TECMA 2017, which will be held March 7-10, 2017, at Expo Bancomer Santa Fe, in Mexico City, Mexico. Visit Booth 1060 to see the T-A drill system, which features high performance inserts and holders particularly ideal for automotive holemaking applications used in manufacturing engine blocks, crankshafts, pistons, and suspension parts. Using T-A drill systems helps manufacturers achieve costs per hole that are 25-50 percent lower than other options in the marketplace.
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Custom Gunsmith Casting Call

I’m a casting producer for a production company out of Los Angeles. We’re currently working with a major cable network to find artisan custom gunsmiths for a new TV project we’re working on. I wanted to contact you guys to see if you would be able to help spread the word about our search or happen to know of someone who’d be a good fit!

We are looking for the “go-to” gunsmith for a small town or community. Does everyone in the community go to this gunsmith for buying or repairing their guns? Has gunsmithing been in their family for generations? Do they forge or repair creative custom firearms?

If you know anyone who would be a good fit for this project, please have them contact me! I’d love to chat with them. They can either send me an email (luke.swinney -at- or give me a call.

Luke Swinney
This Is Just A Test | Casting Associate
1200 Venice Blvd., 2nd Floor
Los Angeles, CA 90006

Joe Carlos On Sierra Bullets

I have mentioned in a number of articles how the 90 grain Sierra Match King .224 bullet designed in 2005 was prone to mid-air blow ups due to jacket issues. I talked about this most recently in my December 2016 article, “Gain Twist Barrels For Palma.” Those of us who write frequently for American Gunsmith sometimes find our articles “in the pipeline” for awhile from the time they’re written until they are published. Changes can take place in that interim. This was the case with Sierra’s 90 grain bullet.

Sierra’s original 90 grain bullet remained on dealer shelves for nearly a decade in its original flawed condition. However, it was recently redesigned. I have been testing the newly redesigned Sierra with Berger 90 grain Match Boat Tail and Sierra’s new bullet appears to be blow-up proof. I have torture tested it and have experienced no failures and am obtaining speeds of 2,800 fps in 30” and 32” Palma barrels with stellar results. I also have customers using it and they like it. Accuracy is comparable to the Berger and the ballistic coefficient of the new Sierra is higher than any other 90 grain AR-15 bullet on the market.

I’d like to formally update the record and apologize to Sierra for statements that were correct when written but out of date regarding the new bullet when published in my December 2016 article. Readers should be careful when purchasing Sierra 90s to be certain they are getting the new bullet. I would be leery of any boxes of 90 grain SMKs that have been on dealer shelves for much longer than a year as they may be of the old design. If the dealer will permit you to open the box, the new bullet is factory pointed (which helps attain the high ballistic coefficient) and the older bullet has an open hollow point.

Thanks for your understanding and look for a full article on the new bullet in the near future.

– Joe Carlos