Howdy, there's; federal with speers hot-cor 350gr bullet, winchesters JHP bullet 300gr? remingtons 350gr HP bullet and their 405gr SP.
I don't know what you have for factory ammo in your area , the Remington 350 grain HPs do a wonderful job in my rifle as far as groups go .
stimpy
Please elaborate on the Rem 350gr, as far as I know, they don't offer a 350gr bullet in any form, ammo or component, just the 300gr and 405gr.
Perhaps you both meant the Rem 300gr HP or are trying to confuse me.
http://www.remington.com/products/ammunition/ballistics/choose_specific_loads.aspx?c1=54&c2=&c3=As for throat length, you won't have any trouble with the mentioned factory ammo, it all shoots well in the Handi, but if you get into handloading, most bullets 350gr and bigger, you'll either have to load short of recommended COL or have the chamber throated, H&R NEF 45-70s have notoriously short throats, I throated all 3 of mine so I could load to recommend COL and longer!! All 3 of em were extremely accurate before the throating and still are. You can read about the throating in the FAQs if interested.
As Mac mentioned, the H4198 and 300gr Nosler PP are an excellent combo, it shoots sub moa in my scoped Handi and just as well in my scoped BC at well over 2400fps in both.
Tim