Case Capacity for 327, 32 H&R, 30 Super Carry?

[jski]

Looked online but couldn’t find the case capabilities for these 3 rounds. Could someone with a reloading manual clue me in?

 

[fxvr5]

A reloading manual will not have this information.

 

[film495]

might be in some of the SAMMI specs?

 

[fxvr5]

might be in some of the SAMMI specs?

A search of their booklet found no match for capacity.

 

[mdi]

I can't remember seeing any published stats on hand gun case capacity, rifle cases yep. Nothing in my Hornady #7, or my Lyman #51. This is what SAAMI has to say about case capacity; https://saami.org/glossary/case-capacity/

 

[Blue68f100]

Case capacity varies based on which bullet and how deep you seat it. Different mfg case will be different as with some tolerance differences with batches. You can measure actual case volume with any bullet you want. Remove the primer, seat a bullet to your OAL you want to test. Set some kind of holder to hold the case, (bullet down). Take a weight reading, fill with water from the primer hole, subtract your empty weight (and holder) for your water volume. You may have to work to make sure your not trapping any air bubbles in the base.

 

[jski]

On Wikipedia, for most cartridges, you’ll see something like this:

Case capacity 26.2 gr H2O (1.70 cm3).

This is for the .357. I assume this is the total case capacity, meaning 26.2 gr of H2O is at the case brim? Where are they getting this information?

 

[GeoDudeFlorida]

Looked online but couldn’t find the case capabilities for these 3 rounds. Could someone with a reloading manual clue me in?

Are you willing to do some math? Are you willing to spend a dollar or two on supplies and invest an hour or less of time?

 

[fxvr5]

On Wikipedia, for most cartridges, you’ll see something like this:

This is for the .357. I assume this is the total case capacity, meaning 26.2 gr of H2O is at the case brim? Where are they getting this information?

Not sure. Maybe CIP. QuickLOAD has case capacity listed, but some of those are WAY off.

I've measured case capacity of some handgun rounds and no two manufacturers have the same capacity of the same caliber.

 

[Seedy Character]

^^^^^

Not listed because it varies between manufacturers.

 

[jski]

Are you willing to do some math? Are you willing to spend a dollar or two on supplies and invest an hour or less of time?

I could do the math or more simply use a dropper to fill the case then subtract the weight of the empty case.

 

[GeoDudeFlorida]

I could do the math or more simply use a dropper to fill the case then subtract the weight of the empty case.

Even easier. Go to a drugstore and get a syringe about the size you think the case capacity should be in CC. Plug primer hole, fill syringe with water, transfer water to case until it hits the brim, subtract what’s left in the syringe from the original fill. Voila! Your case capacity in CC. Repeat with a couple dozen or more cases and do some math: minimum, maximum, mean, median, average, standard deviation. EZ-PZ.

 

[mdi]

Way too involved for me. Besides, what informtion would case capacity prvide? IIRC my Nosler manual lists percentages of powder charge filling case. All the case capacity methods I've read were rifle cases with primer intact and filled with water to case mouth. I judge my handloads by accuracy, velocity, and repeatability (Standard deviation), not so much "effeciency"...

 

[GeoDudeFlorida]

I've measured case capacity of some handgun rounds and no two manufacturers have the same capacity of the same caliber.

Which is why some math is involved. The median, mean, average, max/min and SD will fill in the gaps at least well enough for load development.

 

[CoalCrackerAl]

Why do you want to know what the case cap is?