I too use White Lithiumm Grease.
I first started using it in high end Paintball markers when I was in high school. Theese were high end pneumatic, electronic markers that retail for $3500+.
I've read alot about greases when I started cleaning and reassemballing semi's (not the trucks). WLG will not burn, or break down over time. (maybe over decades but definatly not over 2yrs, Ive tested that!) I have put 5k+ through my 10/22 (over a summer)before cleaning and all of the grease was still there.
I also use it in my Buckmark, M&P9 and my Llama .45. I've never ever had a problem with cold, heat or gumming since I started using WLG in my pistols. I highly reccommend it for all your semi automatic firearms.
Cheers