The Prvi's were so bad I had to run back here and spill the beans.
Shooting distances of 180m to 250m is not uncommon at all.
I try to not go beyond 220 with the 30-30.
(I often get this all wrong, because I am not very good at estimating distances in undulating ground - work in progress! )
In dense bush here on the east coast, the Eastern Cape Province and the far north closer is more the thing 80m to 150m.
On the high veld, the Orange Free State grass palins (what the hell is this - I meant "plains" ) and the Northern Cape and Kalahari, the boys are not frightened by 300m and sometimes more.
My small caliber is a 6.5x55 Swede and it performs perfectly at the longer ranges.
Yup temperature here can be an issue. I have walked out at -12°C in the morning and at midday I can be staring at 25°C. My hunting ammo do not get special treatment ~ on a pouch on my side. I do at times have my rifle in my hunting backpack (I use a Vorn ~ made in Scandinavia somewhere), but mostly it is in my hands in the sun or cold.
The 416 Rigby certainly rates as one of two of my two favourite bigger calibers. It has never let me down, either in the heat in Mozambique or Zimbabwe or in the extreme winter's cold of the north western & northern parts of my country.