Case capacity comparisons (edited)

[JamesnTN]

I've been asked what's the water capacity between my case design and the Dasher. So today I did a comparison between the BR my new case and the Dasher using pure alcohol.

The BR capacity is 31.76
The 6 JDP is 32.62
The 6 Dasher is 33.9

 

[Ggmac]

.027 dif ?

 

[JamesnTN]

I may need check it again once I get home

If wrong I'll correct

 

[birdog]

0.27
Sounds about right James

 

[dmoran]

James -
How many cases to each did you check in your comparison?
And how equal were the case lengths to one another?
Donovan

 

[Ggmac]

Yup me bad . .27

 

[JamesnTN]

James -
How many cases to each did you check in your comparison?
And how equal were the case lengths to one another?
Donovan

Just one of each for now I was in a hurry and I did make a mistake and corrected it.

 

[dmoran]

Just one of each for now I was in a hurry and I did make a mistake and corrected it.

Your capacities are way south of any I've measured to the 6BR and Dasher. My Dasher capacities are typically around 41-grains, and the 6BR's typically 3-grains less.
Donovan

 

[JamesnTN]

Your capacities are way south of any I've measured to the 6BR and Dasher. My Dasher capacities are typically around 41-grains, and the 6BR's typically 3-grains less.
Donovan

What were you using to check case volume?

I'm using 100% pure racing alcohol

 

[dmoran]

I use water to measure "water capacities" (for qualification/segregation I use ball powder).
Methanol (racing alcohol) would have far less/lighter density, and will float on water.
Donovan

Edit:
Looked up the density of methanol and it is 21% less/lighter then water (0.791-g/ml).
21% off 41-grains = 32.4-grains <> which is in the vicinity to your measure with it.... lol

 

[CJ6]

and if you use Flint Mich. tap water it may be as high as 50 grains...Sorry couldn't resist

 

[Mozella]

...... snip..........
Methanol (racing alcohol) would have far less/lighter density, and will float on water.
........ snip............

Less dense? ......... yes.
Float on water?.......... no.

Methanol can hydrogen bond with water and water with methanol, so they are miscible in all proportions. In other words, unlike gasoline, methanol and water readily mix. In fact this is the very property which makes those "gas dry" products effective.

 

[dmoran]

Less dense? ......... yes.
Float on water?.......... no.

Methanol can hydrogen bond with water and water with methanol, so they are miscible in all proportions. In other words, unlike gasoline, methanol and water readily mix. In fact this is the very property which makes those "gas dry" products effective.

Good point....
Forgot about that effect when combined with water in my example to the weight of methanol.
Donovan

 

[expiper]

the main thing is a Dasher will use ~ 2 grains more powder charge,,,,Roger