Brass interchangability after full lenght resizing

[Bwana John]

A friend has 2 Model 70s in .375 H&H, one has a loose chamber, one has a tight chamber, and he has ALOT of brass of unknown provenance.

Should brass after being shot loaded with a medium load in the loose chamber and then full-length resized fit into the chamber of the tight rifle?

Is the brass NOT fitting into the tight rifle after full length resizing a symptom of over-loading the brass?

Thanks

 

[MtnCreek]

What makes one tight and the other loose? Dia of the body area or headspace or both?

 

[steve4102]

FL size to fit the "Tight" chamber, then they will fit both.

 

[Bwana John]

What makes one tight and the other loose? Dia of the body area or headspace or both?

The chambers seems have the most difference right in front of the belt, it does not seem to be a case of shoulder length. (right where a case head separation would occur )

I would need to cast both chambers and mic the casting to be absolutely sure.

FL size to fit the "Tight" chamber, then they will fit both.

The FL die(RCBS) is already screwed down to 1/4 turn past contact with the caseholder.

I have had no problems interchanging brass fired in different chambers and full length resized before this.

 

[MtnCreek]

The area at and just above the belt is not sized, even with FL dies. I would have dedicated brass for each rifle. If you run into problems with brass in the tighter chamber not wanting to chamber, you could move that brass to the looser chambered rifle. JMHO.

 

[rcmodel]

I have found it typical in Weatherby rifles when using brass from a different brand rifle belted mag chamber.

It is often belt expansion causing the problem, as the belt won't fit the Weatherby chamber.

Color one of your cases fully with a black magic marker, then chamber it in the tight rifle.

Where the black rubs off is the problem.

There is a collet belt re-sizing die to cure the problem, but I have no experience using them.
http://www.larrywillis.com/

rc

 

[Bwana John]

Color one of your cases fully with a black magic marker, then chamber it in the tight rifle.

Already did that, that is how i determined it was right in front of the belt, not shoulder length.

My plastic calipers can not detect a difference in diameter in the brass at the belt or right in front of the belt, but they are not very precise.

 

[rcmodel]

As MtnCreek noted, a normal FL sizing die does not size the case right in front of the belt.

The Willis collet die I linked above will fix it.

That is the only cure I know of.

That or keep the brass separated for each rifle.

rc

 

[Bwana John]

Thank you, at $96.95 for the die we can just keep the brass segregated for now.

I never was that hot on belted mag cases, and this is another reason to not like them.