Reloadron
Contributing Member
Since recently we have seen a few threads about dummy rounds (those that don't go bang) I thought I would show how I go about it.
Dummy rounds are simply rounds that don't go bang. They lack a primer for ignition and powder as a propellent. They have several uses but I would guess primarily to check the operation or manual cycling of a gun. The cartridges I am using and pictured are 308 Winchester but could be any cartridges. I will be loading 308 Winchester sans primers and powder. Not really much to it.
So we need some brass and bullets:
There are several ways to identify our rounds as being dummy and non-shootable. My preferred method is to drill holes through the brass cases. In this case a single hole is drilled about 1/2" up from the case heads. This results in two holes in each case. Sometimes I come up another 1/2", rotate the case 90 degrees and drill another through hole. The idea here is simply to identify the case as a dummy. Other methods use paint or marking ink. I just happen to like holes.
Sizing The Brass:
I like to do a full length sizing of the brass cases. Since these dummy rounds will be used in a variety of rifles I want a case with dimensions that should fit and function in any rifle that has a chamber meeting 308 Winchester specifications. Not pictured is I use a good RCBS precision micrometer to check my datum point on the case shoulder.
Trimming The Brass:
The Maximum case length for this cartridge is 2.015" and the Minimum is 1.095". I like to trim my cases to 2.005" placing my case OAL in the middle of the range. In this case I am using very common and inexpensive 150 grain FMJ bullets. I also like to keep everything uniform so each dummy cartridge is as uniform as possible with the others. Uniformity and cases that meet specifications is important if we expect these dummy rounds to work well in a variety of chambers.
Seating The Bullets:
Finally with our dummy cases marked to indicate they are dummy rounds, sized uniformly, and trimmed to uniform length we can seat our bullets. Uniformity again is important as we want all finished cartridges to have the same uniform equal length.
The Finished Product:
A nice addition I did not bother with would have been to take some spent primers, remove the anvils and place some red RTV in the primer pockets using a toothpick. Then prime the cases with our dummy primers inserted upside down. Just a matter of getting creative. The bullet tips could also be painted a unique color and the list goes on.
The most important aspect in my humble opinion is making sure the cartridges end up uniform and being well within specifications.
308 Winchester Cartridge & Chamber Specifications:
That's about it............
Ron
Dummy rounds are simply rounds that don't go bang. They lack a primer for ignition and powder as a propellent. They have several uses but I would guess primarily to check the operation or manual cycling of a gun. The cartridges I am using and pictured are 308 Winchester but could be any cartridges. I will be loading 308 Winchester sans primers and powder. Not really much to it.
So we need some brass and bullets:
There are several ways to identify our rounds as being dummy and non-shootable. My preferred method is to drill holes through the brass cases. In this case a single hole is drilled about 1/2" up from the case heads. This results in two holes in each case. Sometimes I come up another 1/2", rotate the case 90 degrees and drill another through hole. The idea here is simply to identify the case as a dummy. Other methods use paint or marking ink. I just happen to like holes.
Sizing The Brass:
I like to do a full length sizing of the brass cases. Since these dummy rounds will be used in a variety of rifles I want a case with dimensions that should fit and function in any rifle that has a chamber meeting 308 Winchester specifications. Not pictured is I use a good RCBS precision micrometer to check my datum point on the case shoulder.
Trimming The Brass:
The Maximum case length for this cartridge is 2.015" and the Minimum is 1.095". I like to trim my cases to 2.005" placing my case OAL in the middle of the range. In this case I am using very common and inexpensive 150 grain FMJ bullets. I also like to keep everything uniform so each dummy cartridge is as uniform as possible with the others. Uniformity and cases that meet specifications is important if we expect these dummy rounds to work well in a variety of chambers.
Seating The Bullets:
Finally with our dummy cases marked to indicate they are dummy rounds, sized uniformly, and trimmed to uniform length we can seat our bullets. Uniformity again is important as we want all finished cartridges to have the same uniform equal length.
The Finished Product:
A nice addition I did not bother with would have been to take some spent primers, remove the anvils and place some red RTV in the primer pockets using a toothpick. Then prime the cases with our dummy primers inserted upside down. Just a matter of getting creative. The bullet tips could also be painted a unique color and the list goes on.
The most important aspect in my humble opinion is making sure the cartridges end up uniform and being well within specifications.
308 Winchester Cartridge & Chamber Specifications:
That's about it............
Ron