Yesterday, north of Tiber, we were in -17* and 6" of snow, calling coyotes. The lake was too low to launch a boat, even if it was not freezing on the edges.
My wife makes all our bags. She uses cotton or linen Bed sheets and pillow cases, used.
When they get mucked up or ripped, we toss them. We get several washings and multiple uses out of them.
Hammer is great in a low-volume chambering is the way to go.
If you're stuck buying ammo, here is a great choice.
https://hendershots.net/product/7mm-08-remington-extreme-custom-ammo/
I always try to get the best I can with a particular chambering. I want to say an inch. BUT.
When you are shooting a target, you have a Point to aim at. On game, you don't. You have to "pick" a spot and pull the trigger. I'm more concerned with hitting that spot. Take a full-size target out and...