Originally Posted by AJ Peacock
My 300WSM (savage 26") shoots lights out with 60gr Varget and a CCI BR-2 primer in norma brass with the 165gr Hornady spbt. But when it gets cold, the Varget gets tough to ignite. I'm working on loads with H4350 and 200gr and 180gr Nosler Accubond.
I hope you're not trying to make those 180 or 200 grain Accubonds fit into a magazine with H4350! If you are, they must not be loaded to max speeds because you can't get much powder in that case with those long bullets.
I have found Varget, Imr 4007ssc, and N140 give near 100% load density with these bullets loaded to fit the magazine and you don't lose any velocity.
I also tinkered with the 180 AB bullet and IMR4831 and Nosler recommended amounts and found that the powder was preventing the bullets from being seated where the die was trying to seat to by .020"!! And after one hour of sitting atop that powder charge, the bullet was pushed out an additional .010"!! And it wasn't just Nosler, all the data I found recommended amounts of powder simply not attainable if the gun's magazine was to be used. FWIW.