I only used one rifle and one caliber for actual testing but had a hunting load for a 308 that was loaded with Varget and only saw 28fps average variation between 94 degrees F cold barrel shooting and 26 degrees F cold barrel shooting.
My old load with Rx 15 produced 73 fps variation and a load we had with W748 produced 124 fps variation all with the same conditions.
Far from a scientific experiment but I've been using Varget since the first year it came out and almost always shoot through a chronograph at the range and have had similar results ever since.
Almost all my rifles shoot nothing but Varget and velocities seem to be very stable through temp changes and with different cartridges.
Velocity is always excellent and accuracy seems to usually be very good.
From 223 Remington to 300SAUM plus in my 375H&H, Varget is my number one choice and I've never had reason to doubt it or change...
$bob$
