They are the same except the neck dia. and neck length.
All you have to do is run the 300 case through the 7RUM sizing die and depending on
your chamber you may have to turn the neck if it is to thick.( but probably not ).
To find out ,Measure the case neck OD of one of your fired 7 RUM cases, Then size and push a
7 mm bullet in one of the 300 RUM cases and measure the OD of the neck with the bullet in it.
There are other ways but this way all you need is a micrometer.
If it is less than the fired 7mm case neck then your home free.
I WILL consider myelf a novice reloader. i reload everything i own except 17hmr, and shotguns.
I have read about neck turning but i hear its for the expeirenced . i cant remember much about how its done. i will have to read ?
my only advantage is trying to get some brass from some1 who dont reload the 300 or 7 rum. witch is prolly hard. Any tips?
sinclair stuff is so nice, i dont own anything sinclair, but everything looks like great quality. so the neck turner . turns neck to whatever spec u have its set at, rolls the brass like? Im def. goin to read some more when i get some quiet time
I've read a lot of mixed reviews on Nosler brass, you might want to read up more on that. Remmington isn't the best brass in the world, but it works. I've heard a rumor that Lapua might start making 300 RUM brass. So far, just a rumor as far as I know.
