125 gr Sierra, Powder H-4227, 16.5 grI don’t recall seeing that 300 Blackout recalled Magnum primers. But it’s been awhile and I may be mistaken.
What source(s) are you using?
The general advise is to use a few to verify and be safe.
It’s also recommended to reduce the load and TEST if you’re going from standard primers to Magnum ones. And I believe some powders like them better.
So with all of that, I’d suggest you post what load you’re looking at and someone here can check on it.
Correct..But I wonder why ??Hodgdon Powder data recommends SRM primers on all of their 300 AAC Blackout loads.
http://www.hodgdonreloading.com/data/rifle
Like I said above, ball powders should be set off with a magnum primer. If you're using W296/H110 you should be using magnum primers.Correct..But I wonder why ??
Correct..But I wonder why ??
I wonder about the ball thing....unless spherical & ball are two different things? Accurate/Western list lots of loads with spherical powder & with standard primers.
Dunno what is "right" - I know I use magnum primers for .357MAG w/ W296/H110, and for all .223 since it is most likely going thru an AR and I want the harder cup just in case. That works just fine for me & don't seem to have any issues from it.
In general that is good advice but I wouldn't follow it blindly. Years ago I would have agreed more but not as much today. Years ago load manuals would reflect the best combination of components. They recommend a magnum primer loading W540/HS-6 but not for W231/HP-38. Today if those powders are being used in the .357 Magnum they list a magnum primer for them all. If they are being used in the .38 Special it's a standard primer for all of them. They no longer choose the primer best suited and instead to for standardization.I just follow published load data from the manufactures. If the load manual I'm using say magnum primers , I use magnum primers. If it says non magnum primers then that's what I use. They do pressure testing extensively. I don't have the money or equipment to do that testing so I follow their recommendations.
I wonder about the ball thing....unless spherical & ball are two different things? Accurate/Western list lots of loads with spherical powder & with standard primers.
Dunno what is "right" - I know I use magnum primers for .357MAG w/ W296/H110, and for all .223 since it is most likely going thru an AR and I want the harder cup just in case. That works just fine for me & don't seem to have any issues from it.
More than once I thought about that but never asked. Glad you did.I wrote Hodgdon and asked why they recommended a magnum primer with W231 in the .357 Magnum but a standard primer with W231 in the .38 Special. The answer, some reloaders with automatically use a magnum primer in a magnum cartridge so if the develop the data with a standard primer and the loader uses a magnum primer it could cause an over pressure problem.
Yep, that is how that played out:I think Olin/Winchester trademarked the term "Ball Powder"... so any other powder manufacturer/marketer cannot call their product made by the same process "Ball Powder"... hence, "spherical" powder.
Funny thing is, now days the ball/spherical powders are actually flattened ball powders...