reloading 300 WinMag

[lorenk]

I have just reloaded a bunch of .300 WinMag. I grabed the worng primers (large rifle Mags) and reloaded alot. Dose anybody know if this is alright or is it best to just disasemble all the rounds and start over with the right components? I put a 180 gr. spitzer on top of 70 grs of H4831 with a CCI 250 Mag. primer. Is there a chart or formula that I check to see if this is safe? Any help would save me a lot of time. Thanks for any help that anybody can give me.
 

[zebcoboy]

Sorry dude. 70grains is a max load in my book. The rule of thumb with mag primers is to reduce the load 3grs to start. Since you started with a max load you are puting yourself at risk. Don't shoot them.

[zebcoboy]

The very first thing a new loader should have is a late copy of a recognized reloading book. I almost ruined a good gun using data from a 20 year old reloading manual. A big cartridge like that should be using mag primers but here again only with data from a manual that designates the use of a mag primer.