Originally Posted by
BarnesAddict
No disagreement but........ if you want 100% reliable ignition 100% of the time, the magnum primers should be used in most cases in extreme cold. There's a reason Western recommends magnum primers. BH is actually a smokeless propellant and must have the bullet compressed on the propellant hard for consistent ignition and groups. Magnum primers use higher pressure than standard primers, thus ignition is more consistent.
I have had 100% reliable ignition 100% of the time with W209 primers. Your not telling me anything I don't know about bh209. Zero degree, wet, nasty weather is not the worst conditions but isn't exactly warm or mild weather either. Powder ignition is not solely based upon the type of primer you use either. Seal and breechplug design plays important roles as well. I'm just stating my experience. You say if I want 100% ignition 100% of the time I have to use a magnum primer. Not from what I have seen.