ADG (Atlas Development Group) ADG is a U.S. company that advertises their brass as the best in the world - meaning that it's the most consistent and durable. See below from their website:

ADG Brass Cartridges are the worlds most consistent and durable brass cartridge cases produced. Manufactured completely in the U.S.A. using 100% U.S. sourced raw material. To achieve the best results in long distance shooting, you must start with the best materials – brass, bullets, powder, and primer. ADG manufactures the highest consistency and greatest durability brass currently available anywhere on the planet.

• World Record Setting Consistency
  
• Extremely Consistent Internal Volumes
  
• Minimal Lot-to-Lot Variation
  
• Industry Leading Durability for All Calibers
  
• All ADG cartridge designs are tested to a minimum of 10 firings at SAAMI Max. pressure with no inter-firing annealing.

Sounds truly great, but what I wonder about is that the maker also claims that their brass is structurally different - bulkier - than other "normal" brass, which may result in less case capacity. This apparently requires reduced loads, as compared with "normal" brass. See this from their website:

ADG manufactured brass is optimized not only for consistency in performance, but also for durability. One of the ways we accomplished this is by optimizing the material in specific areas to strengthen it. With the optimized material geometry, our brass will generally have a different case volume than most other manufacturer’s brass and therefore will require a different charge weight to achieve the same pressures and velocities.

We recommend using a reputable load data source and working up from their recommended minimum starting loads. We recommend reducing any existing charge weights by 10% and re-developing your specific load when replacing any component in a load recipe with a new component (brass, projectile, primer, or powder type). Failure to reduce charge weights established using other manufacturers brass may result in higher pressures and velocities while using ADG brass and may result in unsafe pressure levels.

This makes me wonder if peak cartridge performance might suffer.

If anyone has used this brass, I'd be interested to know what you think about it.

Its top tier brass right up there with Lapua, Alpha Munitions, & RWS. I've used it in .300 Win mag and have a supply laid in for 300 PRC and 7-6.5 PRCW.

Performance doesn't suffer due to the slightly reduced capacity but you need to vigilant of the velocity you're getting and pressure signs (if you believe in them) you may get. In my experience if one is getting pressure signs with any of the top tier brass you're already beyond saami/CIP maximums and ADG is no exception. The brass is tough and very consistent regarding neck thickness and concentricity TIR out of the box.

Also of note is ADG is going to offer .338 Win mag, .375 H&H, and .416 Rem mag as well as a few other new offerings this year.

Here's a long format podcast where the ADG crew talks about their brass and other offerings.

Shoot2Hunt Podcast ADG interview part 1

Shoot2Hunt Podcast ADG Interview part 2

Thanks, David.

Great information.

I am looking for some good .375 RUM brass and right now, anyway, ADG seems to be the only game in town.

I think I'm going to buy some.

Obviously, their brass is heavier and therefore reduces the capacity of the pressure vessel (chamber dimensions less the volume the brass of the case fills). Their brass may also be harder in the head area.

Reduced capacity will inevitably result in an increase in pressure with the same amount of propellant.

However, the heavier, harder brass will not show indications of pressure compared to "regular" brass until pressures are somewhat higher.

Since the steel of a modern bolt action has far more strength than any brass case, it is the strength of the case which limits the sustainable pressure.

In other words, you won't experience expanded primer pockets or sticky bolt lift with the harder brass even though the pressures might be several thousand PSI higher.

Is this higher pressure "safe"? Sure it is. Will it wear on the bore more than a lower pressure load? Sure it will. Will it result in better, worse, or same accuracy? Only shooting it will tell.

BTW: The military has chosen to spec their brass for small arms heavier and harder than that generally produced for the civilian market. Even though the military doesn't typically reuse their small arms brass, and thuse sustainability of the brass is not an issue, they want the tougher brass to assure that occasional pressure excursions (due to a myriad of possible reasons) don't result in an inoperable firearm.

quote:

Originally posted by Michael Robinson:
Thanks, David.

Great information.

I am looking for some good .375 RUM brass and right now, anyway, ADG seems to be the only game in town.

I think I'm going to buy some.

So happy to see you are using Remington's copy of my wildcat!

Actually, here is a funny story.

We arrived at Chete, Zimbabwe for our safari.

A few days later, an English gentleman and his PH passed by our camp on their way to another camp.

Guess what?

The English gentleman had an almost exact copy of my wildcat, the 375/404, he designed himself.

Who can imagine this happening??

That is indeed an odd coincidence.

In my case, I am not giving up my big bores or double rifles.

I simply had two .300 RUM rifles.

I decided to make one of them, which is a Winchester CRF Model 70, into a .375 RUM.

I’m now assembling components to load 300 grain Barnes TSX bullets for it.

Your .375/.404 rifles were definitely my inspiration!