Originally Posted by Forrest Ebert
If one is going to hunt in cold weather conditions with the 280AI one should not work up loads with Reloader powder and two try magnum primers instead of reg large rifle as this will help ignite the powder more efficiently than the standard with a case full of powder.
That is exactly what I was/am going to recommend. Glad I went ahead and finished reading the thread. I don't think some loaders understand just how SLOW Reloder 22 really is. .....or H1000, Retumbo, and even 4831. Many many years ago, 4831 was the slowest you could get and even then a lot of loaders used magnum primers with it back in the day.
So, let me say this; I think it is reasonable to go to a magnum primer when you shoot a long, skinny case and a slow powder. There's nothing wrong with this technique, ESPECIALLY when hunting in temps 30 degrees and cooler.
I switched from 210M to 215M quite some time ago when using some of the 4831 loads and anything slower in many if not most of my rifles and I'm glad I did. Not only did accuracy improve, I get to use a little less powder with equal or higher velocities. Example: 30.06/180 bullet/Re22/215M primer. Same with several of my 270s. I would not even consider a non-magnum primer in a 280AI with a slow burning powder. That's a nice long column of powder and I want a big blast of ignition to launch that bullet.