Home Forums Reloading Big Game Rifles IMR 7828 VS RL 22 Temp. sensitivity

Been reloading for 30 odd years burned enough imr 4350 to tell you it would loose an average 100 fps from 70 degrees to the low teens for deer hunting in central wi,really not a fan of imr 7828 burnt one lb testing in my 300 bee Vangard best groups hovered around 1 inch not impressed haven't tried it since, but RL/22 wow that has kiked tale in my 7Mag 25/06 tested some top end reloads in the 25/06 in the mid-teens for temp ,and they chronograph within feet of each other mid-70s to the mid-teens like 17 degrees cold , so no I'm not buying into the negative hype about RL-22 sorry proved it to myself that's enough for me,tried h4831, against RL-22 again no contest RL-22 kiked butt. Wish you all southerners could spare some RL-23 n RL-26 I'd sure like to burn some , almost forgot RL-22 kiks h4831 in my 270wcf hands down , tite groups to 3 shots 3/8s c to c ,carry on😉

T A G -

Well.........

When I did my test, it was with same lots of components and only thing that was different was the brass I'd used at 75 degrees. The ammo and rifle were left outside overnight so it cooled. Did you do the same when you tested or just take it all from a house out, shoot it at different temps and decide it didn't show much difference?

Don't get me wrong, RL22 is a favorite powder of mine in the 270 and it's a top performer in velocity and accuracy for me. I've not had issues with it hunting and have shot bucks in sub zero weather without issue, but that doesn't change the fact that it does lose velocity...at least in the 270. I can't speak for the 25-06.

Well this may be a bit off the wall but two powders I use a lot are W760 and Winchester Magnum Rifle powder. (WMR) Both have a reputation of being rather temp sensitive. I use WMR in the .270, .280 Rem. and .300 Win. Mag. New to the .280 so no cold weather work with it yet. Hopefully this coming December when I do an elk hunt.
Anyway, I load and test in Tucson's hot summers and when I have hinted the Kaibab or area 1 for elk, loss of velocity hasn't seemed to be much of a problem. Some of my work up for the .280 is with IMR7828SSC so if I find a satisfactory load I'll taking that one for sure.
Another powder I use is Re15 for my .35 Whelen which is my usual elk rifle these days.
Rifles I have taken to Raton New Mexico that have shot well with W760, Re15 and WMR have shown no apparent velocity or accuracy loss when checking the sights at the NRA's Whittington Center. I won't have any final answer on IMR7828SSC until December 28 or 29 if I do end up using the .280. So far it's proving to be a little stubborn on telling me what it likes. I'm thinking it's probably the bullet though rather than the powder. I'm trying to get a load with the Nosler 150 gr. ABLR and not only does the .280 not seem to like it but neither do three 7x57s I've tried them in.
I'm thinking that 7828 probably will work OK if your rifle likes it. I won't be able to make an informed comment until early on into the New Year.
Paul B.

I had loaded 100 rds for my 25/06 cronographed them in 70 degrees and a couple months later tried the same reloads out of the same bag ,no I didn't leave my rifle out over nite ,at 17 degrees its very cool my time out side was about 45 minutes good enough for my test. Rifle, reloads, we're all the same only the outside temp was different. For years all I used was imr 4350 with was accurate but threw cronographing found it would loose 100 Fps so I'd adjust my site in using the lower cronographed reading. For my hunting zero.