Heres the skinny, I am somewhat new to reloading but have a pretty good grasp of it. In august I am going to Kyrgystan in search of a mid-asian Ibex. My Shots will range anywhere from 200-500 yards so i would like to get proficient to atleast 500 yards. My elevation will be anywhere from 12k-15k feet and temps ranging from 20-80 degrees fahrenheit, with those being extremes.
My problem, I have a Tikka .300 WSM
and I did quite a bit of load development over the winter and found a load that performed way above any of my expectations. Problem is this was one of the only loads that performed at all.
CCI 250 primers
180 gr Nosler AB
66.0 gr of RL-17
This load worked great until the temps started to increase above 70 degrees, with temps above 70 my pressures start to spike. (stiff bolt lift and loose primer pockets). And my POI changes significantly.
Ive done some research on RL-17 and the temp sensitivity seems to be quite common. Ultimately I'd like to stray away from this powder if possible.
Powders I've tried so far:
Projectiles I've tried so far:
175 Berger hunting VLD (performed well when seated out past mag length)
I will say that the factory Nosler ammo performs quite well out of my gun (MOA'ish) and that is my back up plan if all else fails.
My question is there something im missing here or could do differently to find a load that will perform well out of my gun?
Any other powders, projectiles, or loads that you guys recommend?
I was thinking of trying 7828, 7828scc, Retumbo
Any help or input will be greatly appreciated and dually noted
Thank you, Dexter Grayson