I haven't seen the claim that AR Comp is more temp-resistant than RL-15. Where'd you find that? On the Alliant website they just claim both are consistent across a wide range of temperatures.
RL-15 is pretty good--or has been for the last 10-12 years, since it was reformulated for military use. But in my own tests it still isn't as temp-resistant as the Hodgdon Extremes. I haven't had a chance to test AR-Comp in cold weather yet, but it has shot real well in more than one .223. Can't remember trying it in any other case yet.
JB,
Ben Ammonette at Radford Arsenal Told me that.... I was calling asking about load data... I had learned of the powder from an Article that called it the Swedish Varget... don't remember what magazine.. but was something I was probably thumbing thru at Bi Mart or Walmart and it caught my eye...
Ben had told me that it was supposed to be a temp insensitive version of RL 15..... so I asked if I could just use RL 15 data and he told me NO, as AR Comp turned out to be a hair faster than RL 15....
So I asked if I could use RL 12 data and he told me that it was faster than AR Comp...
I have tried it in the 223, 22.250, 243, 6mm Rem and 260 ( with 100 grain bullets and down in weight.. mega accurate with Sierra 85 gr and 100 grain HPs and Nosler 100 grain Ballistic Tips, in at least my Ruger factory rifle and my ER Shaw Model 70....
