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I'd suggest you either try to locate commercially built ammunition, or find someone who already knows the field & can do what you need for you.
You're starting out with no knowledge base whatever, and you're not going to achieve the results you want either quickly or easily.
Learning that gun, caliber, and big bore BP rifle loading is not something you'll do in a couple weeks.
You would have been better off buying a .45-70 for your purposes, but you CAN still shoot .45-70 loads through your gun. I don't know how far you need to shoot for the camera, but you may be able to get sufficient accuracy with a .45-70 load to show what you need to show.
They may be easier to locate even in Europe, it's a much more popular caliber.
.457-459 bullets are available from a number of sources, check the Internet & find out who'll ship to your location. Not knowing your bore, best to stick with .458-459.
Still think there's something wrong if you can only get 80 grains of BP BY VOLUME in a 110 case.
How are you measuring that grain weight?
Denis
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