ICI Kynoch .375 question

[Hoss Delgado]

Hi , everyone. New to these forums but been hunting since childhood . Nowadays ,I use predominantly a Winchester Model 70 in .375 Holland and Holland Magnum for all my hunting purposes . Love the rifle . Love the round. I plan to take it to Africa in 2020 for an Elephant or a Cape Buff. I also read a lot of big game hunting books in my free time . I was reading this book called " kambaku " by an Ivory Hunter called Harry Manners ( Good read BTW ) . He basically used the same kind of rifle l coincidentally own . Anyway , In one chapter , Harry is talking about how he would use ICI Kynoch .375 Solids in his rifle ( this was in 1945 ). He says that initially , the Kynoch .375 cartridges had A LOT of Driving power and he actually once downed two elephants in one shot ( a bull was standing behind the cow he shot ). He mentions that not long after wards , Kynoch .375 cartridges no longer had the souped up driving power and Kynoch had reduced the powder charge.
Is there any accuracy in what he said ? Were the early ICI kynoch loads really more powerful than the later loads ? find it really strange that Kynoch would actually reduced the powder charge of a cartridges . I uploaded a picture from the relevant page of the book.
Really appreciate the help,
Hoss

 

[Hoss Delgado]

Also , can someone help me with this terminology , which l came across in the book ?
" full- patch type solid bullet ( slightly flattened at the point ) " ?
Is that basically a .375 H&H round nosed solid ? Or is it something else ?

 

[Brandon.Gleason]

Full patch referred to full metal jacketing.

I cannot comment on the ICI Kynoch downloading.

 

[spike.t]

Maybe try sending an email to David little at Kynamco about whether kynoch changed the loading in those days.....

http://www.kynochammunition.co.uk/

 

[Hoss Delgado]

Maybe try sending an email to David little at Kynamco about whether kynoch changed the loading in those days.....

http://www.kynochammunition.co.uk/

Thank you so much. Professional Hunter , IvW ( a forum Member here ) gave me the answer . The early Kynoch loads up to 1945 DID have souped up driving power. BUT this came with a serious risk or propensity of the bullets ( especially Round Nosed Solids , but also soft nosed ammo and Meplat solids ) to Mushroom / distort or deflect off the animal's bones . You can imagine how risky that would be . Thus , Kynoch reduced the powder charge in the .375 H&H Magnum calibre

 

[bruce moulds]

so what were the ballistics before and after the reduction in charge?
bruce

 

[Hoss Delgado]

so what were the ballistics before and after the reduction in charge?
bruce

They reduced it to 100 fps

 

[postoak]

Well that wouldn’t penetrate very well!