would like to know the dimensions of you unfired brass and if any make of brass is larger or smaller?

Interested in the base dimensions above the rim. The book says should be around .4729" and rim is the standard .473.

Thanx...

Rim dimensions are the same as '06, and the case head is .0013" larger than '06, which I think everyone pretty much ignores. I anneal '06 and form it to 7x57, because my local source doesn't stock 7x57.

Loaded to modern pressures, the 7x57 is very, very close to the 270 ballistically.

I just measured a Remington factory round, .467" rim, .463" top edge of extractor groove.

quote:

Originally posted by craigster:
I just measured a Remington factory round, .467" rim, .463" top edge of extractor groove.

My RPs measure the same as Craigster's. On a fired resized case The largest body diameter is
.467". I've for a long time considered these cases to be a scoch on the small side but they never gave me any trouble so far.

The New 8mm RP, unfired cases have a head diameter of .4668" and the rim= .4671" ( 1 cases measured only)