I purchased my first magnum (7mm rem) recently and would like to reload for it. CAn some of you experienced in magnums give me some tips to help out or look out for. I have been reloading for about 5 years now, but never a belted mag. Is case stretching as much of a problem as I have heard? Tips for getting around it? Accuracy tips? Full length dies or neck sizer?

Thanks,
CAL9

I have reloaded for my .300 Win. mag. for about 12 years. I only neck size and have had no trouble with cases stretching or case life. I do not load hot and have the same cases I started with. I can not begin to guess how many times they have been reloaded.

Same here as Jacobite except for hunting ammo I set the shoulder back .002-.003".

Double check every few loading with a sharpened paper clip bent in the inside. Feelabove the belt. That is where most of the case strech happens. You will be able to feel a rim forming above the strech. It is easier to see if your reloading manual has a section on checking cases for defects. I think Hornady and Speer (going by my memory)manuals have a cutaway of what the this looks like.

Hcliff

Ignore the belt and re-load just like with a bottle necked cartridge. Neck size until you get ready to go hunting then set your shoulders back a tiny amount. Just enough to allow ready and rapid reloading. Good luck, most 7mags are tack drivers.