308 berdan primed
Can a person drill out a 308 case that has berdan primer holes amd use a boxer primer in them any info would greatly appreciated Thanks Bob
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It would not be a wise choice to try that method. By drilling an additional hole you would now have 3 holes and likely too much pressure would be generated upon firing..... that could be dangerous. 0 -
Although this has been attempted in the past, it is difficult to get it to actually work. The Berdan primed cartridge case has what is called a integral "anvil" in the recess in the base that the Berdan primer rests on. This has to be flattened out, rather then completely drilled away. So that the Boxer primer can be seated flush with the head of the case. Also the primer recess diameter has to be no larger then .210 to accommodate the Boxer primers with a interference fit. 0 -
You could probably mill or drill the anvil out but the primer hole is still slightly larger than a stardard boxer primer. Loose fit=lots of gas drenching the shooter and possible firearm damage. Not worth it for such a common cartridge. 0 -
thebob1111,
This is the protrusion that rufe-snow is referring to:
This protrusion will prevent the Boxer primers from being used.
The cross section shows the constructions of the two types of primers:
Best.
ADDED:
leeblackman,
British .303 Incendiary B. Mark VI
Specimen and photos courtesy of Paul Smith
This particular loading was relatively short lived and was replaced by a design less complicated. The round is loaded with a nitrocellulose powder (thus the `Z' designation in the headstamp).
Headstamp is K1941 BVIZ
(K= Kynoch, the maker; 1941= date of manufacture; B= Incendiary; VI= the Mark (or model); Z= nitrocellulose powder.)
Note the brass screw threaded base, steel sleeve, aluminum nose insert and steel ball (to increase sensitivity).
Historical background courtesy of Tony Edwards:
In the late 1930s, with war approaching, the British wanted a new .303 inch incendiary for air service to replace the phosphorous filled B.Mark IV that was based on the WWI Buckingham design. A base fused design was under development as the B.Mark V but this ultimately proved unsuccessful.
In 1938 a Mr. De Wilde, a Belgian based in Switzerland, offered the War Office new designs of incendiary and explosive bullets. A trial was held at RSAF Enfield with de Wilde's bullets loaded in 7.5mm Schmidt Rubin cases and the results were sufficiently encouraging for further trials to be held and experimental .303 inch bullets to be manufactured in the UK. A modified version of the De Wilde design utilising a small steel ball in the nose was provisionally approved for manufacture in early 1939 when problems occurred.
One of the requirements of the new design was that it could be fired in a continuous 300 round burst, since it was intended to load one gun in the new eight gun fighters exclusively with the incendiary round. The de Wilde failed this test and prematured in a hot barrel causing bulged or burst barrels. Despite extensive testing the hot barrel" problem could not be solved and the De Wilde design was written off as a failure.
A new design was urgently developed, mainly by Major Dixon at Woolwich and this had some similarities to the De Wilde, including the small steel ball in the nose to initiate the incendiary composition. This bullet, to Design DD/L/10091, was approved as the B.Mark VI in December 1939.
It was officially acknowledged that whilst the new bullet owed ten percent to De Wilde's work, it was in fact a new design. Whilst erroneous, the use of the name "De Wilde" was encouraged as it was hoped the Germans, who had tested the original bullets, would continue to believe the British had perfected the design.
Information courtesy of International Ammunition Association
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What kind of bullet is that? 0 -
quote:Originally posted by leeblackman
What kind of bullet is that?
BB top, screw base, what else could it be! [:)]0
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