Resize 300RUM to 7RUM

[Captn C]

I am gearing up to reload for the 7RUM and ran into a bunch of once fired 300 RUM brass.

Can I neck it down and use it?

Any problems if I did?

7RUM brass is kind of expensive and there seems to be a bunch of 300RUM brass laying around....

 

[NYLES]

Yeap, but I havent found any expensive 7rum brass i get remmy brass for $22 a fifty.

 

[Captn C]

Yeap, but I havent found any expensive 7rum brass i get remmy brass for $22 a fifty.

Where?

I was looking around on the web and it was 1/3 more than 300RUM. I also couldn't find many who had it.

Thanks Nyles!

 

[NYLES]

Local reloading shop.....might be $24 a fifty. Remember Full lenght on that once fired 300 stuff.

 

[davewilson]

i've run the 300 into a 7FL die and didn't have any problems. of course it was new stuff. would be nice if you had a bushing die. could get an in between size bushing and go in 2 steps but i don't think that will be necessary. try one and if it gives you any trouble, you might have to anneal the necks. when i did this my necks had concentricity issues.