Im gonna do a test maybe this weekend with reloader 19 & 26. I will Test 60 degree and somewhere in the teens. I will record and post the difference.
here is my test so take it for what it's worth
rl 19 in 7mm with 168gr accubond
Test temp 65degree and 20degree +\-
65 degree string 3 shot strings
2993,2985,2968 1/2 group. This is my sight in load I worked up back of this with know FPS for this load.
2bd string. 2987, 3005
65-70 degree with bullets sitting in the sun for 1 hr
3012, 3024,3021,3022 1/2 group. Little faster impact same point
20 degree with frost on bullet cold
2957,2937,2966,2956
Not sure on this because bullet has frost on it with condensation. Bullets were keep in cooler with ice and rock salt. Temp gun sayin basically 20 degrees
thing I noticed was cold temperature point of aim shift 1 inch low at 100 yards and was not as accurate 1 inch group but I shot sorta fast so it could have been me.
Rl 26 same test
Different 7 mm
175 grain accubond
Point of aim no difference at 100 yards
65 degree 2806, 2805,2787. 3/4 group
15 degree
2741,2795,2785
3/4 group
So far h1000 for me has been really good for temp swings. This is a big deal for me because I hunt from 75 degree to -20.
cheers. I hope this help.
cheers