Powder temperature sensitivity?

[wingmaster36]

Have any of you guys had any issues with pressure/velocity increase and decrease with winter/summer temp changes? I use 68.0 grains of IMR 7828 ssc in my 7mm Rem mag and developed this load in mild 50-60 degree temps and was wondering if I might have problems at 90-100 degree summer days. I read some chatter about the IMR series being temperature sensitive and that got me to wondering?

Thanks
Wyatt

[Springville Shooter]

I have noticed this but never with 7828. I shoot 7828 in three of my rifles on the upper side of pressure and I have never had any problems. I'd still take precautions though and drop a couple tenths just to be safe if you're worried. 20-30 FPS isn't worth it.----------SS

[wingmaster36]

Thanks Spring. I have used 7828 only once before and I have not experienced any issues with temperature sensitivity. I have 150 loaded up and I will check them about August to see if there is any change. My goal is for one accurate load, for everything, all seasons, all of the time.

[Springville Shooter]

I looked in my records and actually have some data for 7828 and RL22 which is pretty similar with 140-150grn bullets and I don't think your load of 68grns should cause you any problems.-----SS