y_not5
I think you already no my opinions. I feel the weak link in your system is the pellets. I feel that it takes more fire to get them to fire. The colder the temp the hotter you are going to have to get them - Therefore I would suggest the Win 209's, which pellet you use doesn't seem in my mind to make a difference, when you are shooting a 100 grains of t7 pellets you are not really shooting 100 grains - you are shooting an equivelent load to 100 grains of Pyro or real BP.
I am not qualified to to make ajudgement on which pellet is better Pyro/t7 becuase I do not have enough experiance with them...
Primers - I just do not hink there is enough past experiance out there to amke a real judgement on the new Remingtons yet. I, personally would use my Remington 209-4's in any temo but I am shooting loose powder.
Good luck on your trip and the hunt....