It is not a BMG case anymore, and it won't go in a BMG chamber
any more than a 3.5" 12ga plastic case will. Just a way
to make a 12ga case.
It makes no difference how a shotgun case is made whether
constructed from virgin paper, plastic, steel, copper, brass, aluminum,etc
in factory stamping presses, or turned from plastic, brass,steel, etc in a
machine shop, like RMC does, or you wildcat other cases into
what you want. I can make 12ga case by reworking 700NE brass,
and I can make 20ga brass cases from 600NE brass, I make 4ga
cases from 20mm brass, a brass 410 case from 9.3 x 74mm case,
a 505 Gibbs case from a military Cheytac case, and so on.
RMC makes a hundred different cases, rifle and shotgun,
from brass bars, big cartridge makers with stamping presses ,make
BMG cases.600NE, and 700NE cases from the same brass draw cups
supplied by the brass manufacturers. If take bmg cases to salvage yard
and they do buy brass, and are smelted and used to make sporting
cases in next go round they are legal. No difference.
There is no differece as far as cases fitting in 12ga chamber; whether
it is an old paper case, a plastic case, magtech brass case, russian
steel case, RMC brass case, a Remington brass case ,our brass case
we make, Active all plastic case; IE, that fit anf firing in the
12ga chamber means it is a 12ga case.No matter how it is made.
The rules say, THE BARRELS MUST BE MARKED WITH THE GAUGE.
Now some info on cases and slugs
The 50 BMG brass can be made into some real
great cartridges, our 12ga FH, shown first, showing
cases with rim turned off and threaded; and the 12ga rim
pieces to be screwed on, with finished cases shown.
And 2nd making my 700HE showing original BMG case,
case with belt only, and then expanded out to 700cal.
This makes a super strong big bore case, as I have
fired some 25 times and case is still good.And
it in my big Vulcan bolt gun gets a 1000gr to 3200.
3rd picture shows our 4bore/ga case with slugs, and
the 20mm case we make them from. They match the 4bore
turned cases that are used in the Ken Owen doubles.
4th the Rocky Mtn Cartridge, 12ga turned 3.5" cases
with variety of slugs and sabots.In picture first loaded
one is BPI sabot, then 730gr Dixie, then 600gr Dixie,
then RG Henson's solid nose and his hollowpoint.
RMC can make cases any length and any gauge.
5th shows a 12ga FH and 10ga FH we made using steel
basecups taken from 12 and 10 ga cases. We turned down
bases a few thousands of the original brass cases
and epoxied the bases. Used BMG case s for 12ga and
50cal Russian for 10ga.This research came from a
another forum poster, like over half of what we do.Ed
More pictures of 12ga slugs and saboted slugs.
1st The US-S sabot/slug, with the green locked on base,
along with others.The US-S slug is nearly as accurate
in smoothbores, for which it is made, as sabots are
in rifled. those pictured are heavier than most other
brands of saboted slugs.
2nd a Jacketed 730gr by RG Henson and a hard,heat treated
600gr by Dixie Slugs in FL, both full bore slugs,
3rd a BPI sabot with hardcast 440gr, .504"
diameter slug. BPIs were intended to use .500" bullets
used in 500S&W, the little larger ones we use seem
little more accurate.Makes tighter fit in rifled barrels.
4th other sabots we tested , 5th brass turned slugs
and there are many other slugs/sabots we'll show..Ed