Originally Posted by
sauer14
This is the OP, went out in Jan,Feb in MN (very cold) shooting my pet loads in 30cal with Win760, it seems like I was getting two explosions, KA-BANG not the usual single CRACK. Never experienced this before but I have never shot in this temp 10F. I have been told Win powder need mag primers for cold weather and this might be right. Groups were off slightly.
Went out couple of weeks ago with H4350 with my favorite bullets for this rifle, Hornady and I was impressed. Best 3 shot group ever with this rifle, and it was VERY cold. groups were constant, maybe the Hornady rep was right.
Only time I've loaded W760 was in a 375H&H, but that thing gets 215 primers only. It's a nice measuring ball powder but I've had better luck with RL15 for my use. For the '06, look at IMR4350 and H4350, and IMR4064. Those tend to be more tolerant powders. IMR4350 works good in so many things(H4350 as well) that may be the only thing you buy from now on.