Re: Confused with 300 WSM loads
as reference my 300wsm load is win brass, 168 tsx, 65 grain rl17, federal gold medal match lg rifle mag primers, 2.92 coal, 3100 fps. this is a sub moa in my win mod 70 stainless and while load development I started getting slightly stiff at 65.5 grains and stiffer yet at 66 grains and only a 50 fps gain so I backed off to the 65 with no pressure signs and very good accuracy. My rifle is bedded, free floated and has a full length alum bedding block as well.
I consider it more of a mid range rifle out to 600 yards and have only taken game out to 400 with it but have taken elk, bear, mule deer, whitetail, and pronghorn with it.
those blown primers are definitely high pressure signs especially combined with stiff bolt. Some times you just have to keep searching and maybe even consider a different weight bullet. If you have a friend with quickload have him run that load for you.