Originally Posted by dave1
I havent looked into my books yet but. is the 7 rum case the same as the 300 rum? if so what process's need to be changed?
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.
J E CUSTOM