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drw
07-14-2014, 05:49 AM
What is the diameter rule??? I read a post that member Manley stated something about the
diameter rule???

dromia
07-14-2014, 07:08 AM
What was it in relation to?

Seating depth?

CastingFool
07-14-2014, 07:21 AM
The only thing I can think of is a starting load for BP RB loads. Whatever the diameter of the bore, that's your starting load, so lets say you have a .50 cal ML, you start out with 50 gr of BP, and so on. Or, multiplying a diameter by PI, (3.1416) will give you the circumference of a circle.

prs
07-14-2014, 10:33 AM
Regarding boolits, maybe the rule of thumb where we often hear and say the boolits should be sized to be .001" over the slugged diameter of the firearm barrel.

Then there is the one about shot guns and "square loads" and all of that.

prs

sthwestvictoria
07-14-2014, 10:49 AM
The diameter rule that you can only beat your wife with a switch that is less than the diameter of your thumb? I think the shoe would be on the other foot if I tried that with SWMBO.

More usefully as Dromia suggests there is a rule that a bullet should be seated a minimum of one calibre diameter into the case neck.

dtknowles
07-14-2014, 10:57 AM
The diameter rule that you can only beat your wife with a switch that is less than the diameter of your thumb? I think the shoe would be on the other foot if I tried that with SWMBO.

More usefully as Dromia suggests there is a rule that a bullet should be seated a minimum of one calibre diameter into the case neck.

I think the rule is her thumb not your thumb :razz:

Tim

runfiverun
07-14-2014, 02:30 PM
I think he may have meant the one-two thou over groove diameter.
it's something else I ignore.

prs
07-14-2014, 02:43 PM
Rools, we don't need no stink'n rools.........

prs

Hannibal
07-14-2014, 03:53 PM
It would seem there are few 'RULES', but any number of 'SUGGESTIONS'.:not listening:

JWFilips
07-14-2014, 08:33 PM
I think he may have meant the one-two thou over groove diameter.
it's something else I ignore.

I think runfiverun has it ..... .002" over JMHO

Calamity Jake
07-14-2014, 08:40 PM
You really need to let the gun tell what diameter it wants!!

mpmarty
07-14-2014, 08:46 PM
Case neck length is my guess. Needs to be one diameter in length from shoulder to mouth on bottleneck cases.

Moonie
07-15-2014, 02:29 PM
The diameter rule, bigger is better... In calibers you dirty old men!

JWFilips
07-15-2014, 08:31 PM
The diameter rule, bigger is better... In calibers you dirty old men!
I do size mine BIG!:bigsmyl2:

Pepe Ray
07-15-2014, 09:10 PM
Diameter rule=
A cloth tape measuring device for measuring the D.B.H. (diameter at breast height) of trees.
Used primarily in Silva culture work.


:redneck:

Pepe Ray

btroj
07-15-2014, 09:24 PM
I thought it was a device where you I put the diameter and it gave you the size of each piece of Pi......

dtknowles
07-15-2014, 10:23 PM
C over pie

btroj
07-15-2014, 10:32 PM
We have covered the diameter rule to the Nth degree?

scaevola
07-15-2014, 10:54 PM
This is a very informative thread. I now know the 'diameter rule' always refers to pie:
http://3.bp.blogspot.com/-L0EHsYDLzis/Tt8p-dbQ8AI/AAAAAAAAAYo/304zbJIai1E/s1600/pie-i-have-not-eaten-7.jpeg