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Mar 28th, 2026
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So I have some 375 Flanged from a buddy's estate.....headstamp is 'HH' '375 FL MAG'. So...it's not 375 H&H, but appears to actually be 375 Flanged (not belted), but I can't find much of anything on the 'HH' headstamp. FWIW -- It was purchased from HDS in June, 2003 - the ticket was still in the box!!

Anyone else ever seen the 'HH' headstamp? If so....any idea who made it?


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HH Holland & Holland

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SKB Online Happy
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Horneber brass I believe.


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Yeah, there was:

375 H&H loaded with Cordite(I have a Coggy DR in this chambering)

then

375 H&H Flanged Mag.(I have some brass lying about somewhere. )

then

H&H Mag, if I have my story straight.


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SKB is correct I believe.
I have some 500 x 3" brass that is from them and is headstamp marked HH


Added:
A quick search and this appeared..
https://www.huelsen-horneber.de/index_en.html


Quite a selection of brass they mfg'r !

Last edited by Kutter; 04/07/26 12:06 PM.
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I imported 100 Horneber cases for my .30 super flanged rifle nearly 20 years ago, great brass!


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I believe this is a winner......thank you, gents. Kutter.....your google-fu must be better than mine!!


Originally Posted by Kutter
SKB is correct I believe.
I have some 500 x 3" brass that is from them and is headstamp marked HH


Added:
A quick search and this appeared..
https://www.huelsen-horneber.de/index_en.html


Quite a selection of brass they mfg'r !


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I am glad this puzzle was solved by SKB. I went down to my shop this morning and looked at the head stamp on a 10 year old box of Norma .375 Flanged Mag cartridges. I was surprised that they read .375 Flg Mag NE.


Stephen Howell
Midlands, South Carolina


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