hello..looking for a custom loader or anyone that could supply ammo for a .40-82 winchester...thanks, john..307-429-9171

Buffalo Arms lists it, but currently out of stock:

https://www.buffaloarms.com/40...-406-26-amo4082.html

The OP will have trouble finding loaded ammunition for his rifle and it won’t be cheap, but he should continue his search - to include auction sites. Here are additional sources, currently out of stock unfortunately. Another excuse to reload for it.

https://www.outdoorlimited.com...ound-nose-20-rounds/

https://www.countrywidesports....chester%20ammunition

https://www.checkpointcharlies...erce/ammunition.html