change in POI with frigid temps

[steven gordon]

Took two of my three savage 10MLII's (I don't have a problem, I can quit anytime I want. I just don't want to quit right now.) out today to sight in. They both hit 3" high at 100 yards; I fiddled the sights a little bit and they're printing in the little circle just fine.

The thing is that the last time I sighted them in it was about forty degrees and today it was about 0 degrees. Is it the temp difference, and if so, do I compensate when it warms up? If not, can I attribute it to just neglecting the rifles for most of the summer and fall, not to mention spring?

I'm using 43 grains of XMR with power belt bullets. Yeah, it's overkill on the size white tail does I take. It's overkill on any whitetail bucks in the state, and it's overkill on elk. It's probably overkill on buffalo.

I leave the bears alone.