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I found this unknown projectile on an auction site (bid.candtauctions.co.uk)
Dimensions unknown, markings incomplete "...UP MK10/..." (as in break-up maybe ?)
In the absence of dimensions, it appears very much to be a "Break Up" round for 40mm Bofors. The projectile is made of Bakelite and weighted with lead shot. Used for gunnery training.
Eggburt1969, I had forgotten about that IAA post so thanks for sharing the photos.
That Australian Break-up is broken as shown but looks good in a case. Quite scarce and I have not found a replacement yet.
Here is some more photos and info from 1987 HMAS Cerberus Gunnery School "Basic Gunnery Locate Ammunition" book. Very basic info covers 40,76mm,4.5" & 5" ammo.
I do not know the difference between Break-up Mk10 and 10/2. Dates shown are from 1968, 1974 & 1984.
Interesting info about gauging before use and toxic warning.
Photo 1 is British Full but missing some print.
40MM
BREAK-UP
6/68
GD 8/6??
LOT 2/?
Photo 2 is an empty projectile with screw-off base.
40MM G
BREAK-UP MK10/2
4/74 LOT 169
Photo 3 is Australian and broken at band. I have never seen one marked BU.
40MM G
BREAK-UP LOT 2
MK10/2 ME 8/84
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