H3 ammunition box. Cartridges 12 Bore No7 Shot

[reccetrooper]

My best find at Military Odyssey this year, and a great addition to my wartime shotgun cartridge box collection.
It's a May 1928 manufactured H3 ammunition box, last used to repack 12 Bore No.7 shotgun cartridges in 1945, presumable for training purposes.

The bulk of stencilling on the box reads:

160
CTGS 12 BORE
LOADED No7 SHOT
REPKD TRE 8/45 /I\

The paper lid label has survived enough to read:
CARTRIDGES
12 BORE
No 7 SHOT

I cannot make out the last line of stencilling in the second photo, does anyone have any ideas?
Earlier use stencilling reads RL 23-3-42 and what looks like GROSS 29lb

My thanks to LCPLCOMBAT, Snufkin, and TimG, for identifying this as a naval box, with TRE indicating RN Armaments Depot, Trecwn, SW Wales.

(If anyone has a scrap condition box that could donate a catch and/or handle, please let me know)

 

[LCplCombat]

I think the TRE is the station it was repacked in on that date.

I think it was originally a Naval box, the large N stamped on the end.

 

[Snufkin]

I think the TRE is the station it was repacked in on that date.

I think it was originally a Naval box, the large N stamped on the end.

Is TRE not RN Armaments Depot Trecwn, SW Wales?

 

[TimG]

As Snufkin states TRE is RNAD Trecwn, which was Radioman1's place of employ.

TimG

 

[reccetrooper]

Thank you gentlemen, interesting information.
Does anyone know if the RN used trap shooting to train gunners in a similar way that the RAF did, or any other reason why the RN would have had shotgun cartridges loaded with birdshot?

This photo shows RAF gunners practising.

 

[gravelbelly]

Thank you gentlemen, interesting information.
Does anyone know if the RN used trap shooting to train gunners in a similar way that the RAF did, or any other reason why the RN would have had shotgun cartridges loaded with birdshot?

This photo shows RAF gunners practising.

The RN certainly used trap shooting for training Fleet Air personnel (Airy Fairies!). On aircraft carriers there were clay pigeon throwers at the stern and the shooters stood on the flight deck above the traps shooting at the clays as they rose from below them.

gravelbelly

 

[AMMOTECHXT]

Number 6, SG and Solid shot 12 bore ammo was in operational use by EOD (IEDD) teams in Northern Ireland in the 1970s and 1980s. Solid was hardly ever used due to the 400 m safety trace.