Nice looking setup!
JMT on that particular bullet, but I wouldn’t load them any faster than the 375 Win which they were designed for. It would make a good practice load, or maybe thick country short range deer load.
Oh you have some fun times waiting getting your new toy all set up and ready to go! Enjoy!
Skinnersblade, given both Governmental and self imposed restrictions I suggest you invite AH members to give you their "Pet" loads for 375 H&H. Determine which one works best for you and then order the components. At first in limited amounts i.e. 1 lb. cans of powder and 50 bullets. If your gun "likes" the load order in bulk so that you will always have some inventory available. Where we can order from a number of national suppliers and get things in a couple of days or overnight providing we want to cover the additional shipping costs. You can not. Sometimes there is a scarcity of components and you don't want to be caught short. The 375 H&H cut its bones on 300 Gn. bullets, I'd start there.
I like 414 too. Very accurate in my rifle. I’ve switched to IMR 4350 behind 300s because that’s what I use in 30-06.
Congratulations on the magnificent shooting with your new .375 Holland & Holland magnum calibre Zastava Model 70 bolt rifle , Skinnersblade . Have you ( till now ) had the opportunity to run 300 grain bullets through your rifle ?
Here is a tip ( Tell me how it goes ) .Not as of yet major the only box I could find were 270 grain federals. I have ordered reloading dies and will try different loads as soon as they come.
Here is a tip ( Tell me how it goes ) .
Source some 300 grain Prvi Partizan brand cartridges and report the results back to me . I have a feeling that you shall be impressed . Trust me .
Skinnersblade, try Tradeexcanada, they carry Prvi Partisan for most calibers. I use their 7x57 Mauser, 9.3x62 and .375 H&H Mag stuff for range work and am very happy with it.Thank you for your advice I will attempt to sorce some although I have been having trouble sorcing any ammunition during the pandemic.