Water weight differences between brass.in my .270

[Gyrfalcon]

What weight/case did you get for your new box of 270 brass?

 

[Gyrfalcon]

The water weight is meant to be an indicator of case capacity.

 

[Lead hammer]

What weight/case did you get for your new box of 270 brass?

Dang was busy forgot. Try to remember tomorrow morning.

 

[Andy]

That's a common situation.

https://www.canadiangunnutz.com/forum/showthread.php/1120440-Some-7X57-Case-Capacities

To be most consistent with the analysis, you need to F/L size, trim and place a fired primer in each. Weigh empty, then fill with water to the brim and weigh again.

The cartridges with a few more grains of capacity gain as much as many "Ackleyized" cartridges.

 

[Lead hammer]

Sorry I was late with the Nosler brass.
I weighed 10. And measured the length of each. OAL
Beam scale
1. 200.8. 2.524
2 200.8. 2.524
3 201.2. 2.524
4 200.7. 2.525
5 200.5. 2.524
6 201.1. 2.524
7 200.7. 2.524
8 200.5. 2.524
9 200.6. 2.524
10 200.3 2.524

 

[prairie lover]

Nosler brass in the boxes is weight sorted. This does not mean that the high and lows get tossed out. They simply fill 1 box with 140.0 to 140.9 and the next with 141.0 to 141.9.

Years back I bought 2 boxes of nosler 260 brass for a long range rifle. I weighed them and found that in the first box they were all with in a grain. The second box were all within a grain of each other as well. Except they were the next grain up in weight. Oh well.....

 

[thump_rrr]

Nosler brass in the boxes is weight sorted. This does not mean that the high and lows get tossed out. They simply fill 1 box with 140.0 to 140.9 and the next with 141.0 to 141.9.

Years back I bought 2 boxes of nosler 260 brass for a long range rifle. I weighed them and found that in the first box they were all with in a grain. The second box were all within a grain of each other as well. Except they were the next grain up in weight. Oh well.....

We’re the 2 boxes of the same lot number?

 

[B]

That's a common situation.

https://www.canadiangunnutz.com/forum/showthread.php/1120440-Some-7X57-Case-Capacities

To be most consistent with the analysis, you need to F/L size, trim and place a fired primer in each. Weigh empty, then fill with water to the brim and weigh again.

Sizing the case will be fine for a direct comparison of the brass but fired unsized brass should be used when determining capacity for loading programs.

 

[jamesharrison]

Further to what potashminer indicated, here is what I came across to demonstrate the pointlessness of comparing capacity of new, unfired cases in your chamber:

.22 Hornet Brass	DRY Wgt.	WET Wgt.	Water capacity	Notes
HORNADY (NEW)	48.2	62.6	14.4
HORNADY	48.4	63.2	14.8	same case as above after firing, but not sizing
nny	58.4	72.4	14.0	fired, but not sized
PPU (NEW)	58.7	70.2	11.5
PPU	58.7	72.7	14.0	same case as above after firing, but not sizing
R-P (NEW)	48.6	62.3	13.7
R-P	48.6	62.7	14.1	same case as above after firing, but not sizing
WIN (NEW)	54.0	68.1	14.1
WIN	54.0	68.4	14.4	same case as above after firing, but not sizing
W-W Super	54.3	68.4	14.1	fired, but not sized
DOMINION	46.5	61.7	15.2	fired, but not sized

Notice the wide spread of capacities when comparing unfired brass. Now, look at the case capacities after firing, but not sizing.

That is the only way to determine what your case capacities, ie. in your chamber, are. It is the size of YOUR chamber that is important.

 

[prairie lover]

We’re the 2 boxes of the same lot number?

I'm not sure. Chances are its not, I bought them at 2 different vendors a province apart but at the same time. Thats all I could find so I had to do it that way.