Well done as always. Really appreciate your videos and the time you take to share your knowledge. I'd watch your videos just to hear your great accent but the info is great as well.
@bzhfbz in theory if you sort your cases by weight first they should be similar in volume. theres nothing stopping you to further batch them firstly by weight then volumetric measurement
Well i for one would buy the dvd spud,have indeed saw the shehane project posts and have learned alot from them and hope to use some of this info when i get my 6br built
@1967spud thanks for the video! Quick question, would it not be a better idea to carry out the exercise on sized brass rather than just fired or does it not make much difference?
One problem I see with this is once you seat a bullet you reduce the case capacity, so measuring an empty case doesn't allow for that. I would think that you need to weigh the case and the bullet, then fill with water, seat the bullet to the depth you would seat it when you load, let the excess water expel from the case and then take your second weight measurement. Even this would give you a 100% filled capacity reading. Usually not what you would load to, unless you like compressed loads... (-:
@1967spud Thanks for the info. I haven't started sorting cases yet. I'm just trying to think what the most practical way to go about it is. I'm just a casual target shooter.
You have not calculated a volume. All you have calculated is the weight of the water. Volume = mass/density is temperature dependent. After converting all of your units 54.96 gn of H20 equals 3.568 cc or 0.121 fluid oz. The variation in the weight of water will be the same variation in the weight of the brass. Assuming that you have the water filled to the top and do not spill any. You set up the chances of additional error in your measuring this way. I believe that I can get the same consistent groups by just sorting my brass by its weight only which is what this exercise is all about.
Calculating water capacity is so you can get the right figure to input into QuickLoad so it can more accurately estimate your pressure curve for a given load. Sorting brass by weight will not accomplish this so that is why some of us do it
Thanks for the video and inputs, i do have one question though: how does one go from obtaining measured case capacity (via filling the case to the mouth, like this) to knowing the effective case capacity for a specific type of bullet seated to a given depth? Thanks! :)
Well done as always. Really appreciate your videos and the time you take to share your knowledge. I'd watch your videos just to hear your great accent but the info is great as well.
@bzhfbz in theory if you sort your cases by weight first they should be similar in volume. theres nothing stopping you to further batch them firstly by weight then volumetric measurement
Well i for one would buy the dvd spud,have indeed saw the shehane project posts and have learned alot from them and hope to use some of this info when i get my 6br built
@1967spud thanks for the video! Quick question, would it not be a better idea to carry out the exercise on sized brass rather than just fired or does it not make much difference?
Instead of using math, couldn't you just zero out the scale with a case and fill it with water while it's on the scale?
That's what I was thinking it would be a lot quicker
What is the model and brand name of the scales that you are using
One problem I see with this is once you seat a bullet you reduce the case capacity, so measuring an empty case doesn't allow for that. I would think that you need to weigh the case and the bullet, then fill with water, seat the bullet to the depth you would seat it when you load, let the excess water expel from the case and then take your second weight measurement. Even this would give you a 100% filled capacity reading. Usually not what you would load to, unless you like compressed loads... (-:
The Quickload program takes the bullet's volume, according to it's seated depth, into account. It does all the figuring for you.
@bzhfbz hink really hard if you need to and then go for it , sort by weight using a beam scale or electronic scales and batch by 1/2 grain intervals
@1967spud Thanks for the info. I haven't started sorting cases yet. I'm just trying to think what the most practical way to go about it is. I'm just a casual target shooter.
You have not calculated a volume. All you have calculated is the weight of the water. Volume = mass/density is temperature dependent. After converting all of your units 54.96 gn of H20 equals 3.568 cc or 0.121 fluid oz. The variation in the weight of water will be the same variation in the weight of the brass. Assuming that you have the water filled to the top and do not spill any. You set up the chances of additional error in your measuring this way. I believe that I can get the same consistent groups by just sorting my brass by its weight only which is what this exercise is all about.
Calculating water capacity is so you can get the right figure to input into QuickLoad so it can more accurately estimate your pressure curve for a given load. Sorting brass by weight will not accomplish this so that is why some of us do it
oh yea now you have to actually get the volume measurement for your grains of powder and account for error and divide into the volume of the case
Thanks for the video and inputs, i do have one question though:
how does one go from obtaining measured case capacity (via filling the case to the mouth, like this) to knowing the effective case capacity for a specific type of bullet seated to a given depth?
Thanks! :)
@223ackleyimp yes defintly thought about it , have you see the shehane project which is more or less whjt you are talking about ,, see it here
im trying to figure out why you care about the average . are you not using this method to sort out cull cases??
its to get a rough value to input into quickload or some other program that estimates pressure curves
I have a question. When sorting cases, do you sort useing weight or volume?
judging by all the posts you have made you realy know your stuff,have you never fancied making a dvd dedicated to the subject of reloading