Blog

Headspace Gauges Explained by Eben Brown, copyright 2018 by E. Arthur Brown Company, Inc. We offer headspace gauges for use in fitting replacement barrels to bolt action rifles. And that's pretty straight forward. But when customers use our headspace gauges to "CHECK" headspace on guns with barrels already installed, it can cause unnecessary anxiety over false or meaningless results. With some guns (like TC Encor …

Trim Length for 6.5mm BRM and Other BrassThere are two reasons to trim your brass: First is just to make sure it's not too long for your chamber. But second, is to even them all up to the same length for accuracy considerations. 1. A Chamber Diagram (left) will tell you the maximum length. If everything measures shorter than that, you shouldn't have to trim unless you want to even them all up. Chamber diagrams for most cartridges are listed at the ammoguide.com website. 2. How to …

A Sweet Spot for Accuracy Exists Somewhere Between a Jam Fit and .150" Off the Lands... Introduction by Eben Brown - The popular thinking is to seat bullets as close to the rifling as possible if you want to get accuracy. But that isn't always the best approach. This article on Long Jump bullet seating was brought to my attention by Nick Wynne (aka UncleNick) on Shooter's Forum. It explains a lot of things... For example: Roger Brown's .127" Group with a bullet seating depth of .14 …

BRM Cartridges - General Information and Descriptions The BRM series of cartridges were developed to give big game hunting performance in cartridges that are optimized for small framed rifles and single shot handguns... Such as our Model 97D Rifle, BF Pistol, TC Contender/G2, and TC Encore. The first (and most successful) cartridge in this series is the 6.5mm BRM. Essentially it is a lengthened and necke …

AR10 Compatibilities: Fitting Barrels, Bolts, and BCGs to DPMS Compatible 308/7.62 NATO RiflesJanuary 31, 2018 by Eben BrownI just got the whole AR10 Armalite/DPMS barrel compatibility issue all straightened out in my brain and thought I would share what I know about it: Unlike the AR15 guns that all conform to a "milspec" standard, the larger frame "AR10" guns are different and we need to know what works with what. To begin with, "AR10" is the name of the 308 gun made by Armalite. It's n …