Belted Mags have gotten a bad knock for years about brass separation because most brass stretch alot on the first firing because it headspaced off the belt and stretch alot at the shoulder even using headspace guages. Its why the .010 longer brass now and people are starting to headspace off the shoulder just like any other cartridge.
Check my logic: minimally headspaced brass
- Thread starter new2mud
- Start date
Help Support Long Range Hunting Forum
Hard rock
Well-Known Member
The gages are one measurement that doesn't change the multiple pieces of brass could possible be diff from case to case if you create headspace to accomodate defective oversize brass thats excessive for that chambering then fire a factoty round you could cause problems I would try to make the brass work without creating excessive head space that a factory round cant be fired in
lancetkenyon
Well-Known Member
Just FL size it right off the bat. You have to either neck size or mandrel first anyway. Why change the rifle to fit the brass, unless you got like 1000 pcs.
Hard rock
Well-Known Member
To be more specific the go gauge should measure 1.6586 most ammo manufacturer allow 004 too 006 thosandths depending the manufacturer and cartridge when reloading in a situation of what your doing you need to determine your length of your chamber compaired to a go gauge then the length of your sized brass to that lenght I
All im answering is the O.P. question. Is it dangerous to do what he wants to. NO as long as the brass doesn't create excessive headspace.
Lance is right, if the dies will size the brass to work thats the best option if not either throw the brass away or increase headspace to fit.
Lance is right, if the dies will size the brass to work thats the best option if not either throw the brass away or increase headspace to fit.
Check your logic? Your logic, on reading, seems to me like stuff I did in my 20;s and 30's, that I look back on and say, "what the heck was I thinking?"
It's a Pandora's Box.
They call them blems, but they're sold off SPS because their QA/QC deemed them defective. So you break something that works to accommodate something that's broke. Kinda like spending $100 to save 20¢.
Full size them, toss the ones that won't fit and chock it up to learning.
It's a Pandora's Box.
They call them blems, but they're sold off SPS because their QA/QC deemed them defective. So you break something that works to accommodate something that's broke. Kinda like spending $100 to save 20¢.
Full size them, toss the ones that won't fit and chock it up to learning.
MagnumManiac
Well-Known Member
- Joined
- Feb 25, 2008
- Messages
- 5,588
You can set the head space with the brass if you know what you're doing with a barrel nut set-up.
Personally, I would size the the brass until it measured the same as the chamber and reduce that measurement 1 thou'.
This is essentially what I do for my comp brass, it gets fired 3 times with only neck sizing then gets bumped to give me 1 thou' off the chamber specs. Then it is kept at that measurement.
Fire a case 3 times and use that as your datum.
Cheers.
Personally, I would size the the brass until it measured the same as the chamber and reduce that measurement 1 thou'.
This is essentially what I do for my comp brass, it gets fired 3 times with only neck sizing then gets bumped to give me 1 thou' off the chamber specs. Then it is kept at that measurement.
Fire a case 3 times and use that as your datum.
Cheers.
new2mud
Well-Known Member
Thanks for all the comments—you have confirmed what I had been thinking:
- potential for die to not be able to size all the way down (if brass becomes too long)
- make sure to isolate for variances—if going this route, don't shoot factory or standard-sized brass since those will have excessive headspace. As long as all brass fired in the modified condition are the same (long in the shoulder), then it should not be a problem.
For those wondering, I will not be resetting the headspace just to accommodate this batch of brass—wanted to use this as an excercise to learn from those who have more experience being students of chambers and headspace. Thanks again.
- potential for die to not be able to size all the way down (if brass becomes too long)
- make sure to isolate for variances—if going this route, don't shoot factory or standard-sized brass since those will have excessive headspace. As long as all brass fired in the modified condition are the same (long in the shoulder), then it should not be a problem.
For those wondering, I will not be resetting the headspace just to accommodate this batch of brass—wanted to use this as an excercise to learn from those who have more experience being students of chambers and headspace. Thanks again.
david g ranes
Well-Known Member
Why go to the trouble changing your head space your resizing die is going to take it back to where it needs to be any way I resize all my new brass just to true the necks it's a fast process I don't even use case lube on my new cases because they are close to speck and don't move much. David
Have you tried the brass in the rifle to see if the bolt will close? I wouldn't change the rifle setup to accommodate brass. If you cannot close the bolt with a case in the chamber just progressively FL size it until it will close then trim case to proper length if it gets too long.
antelopedundee
Well-Known Member
I don't own any rifle chamber for a belted case, but if I did I'd pretend that the belt wasn't there.
antelopedundee
Well-Known Member
If you re-headspace your barrel by .010 just use a .010 thickness shim to set your die so it's .010 short of touching the shellholder.
Last edited:
What if the die won't size it back enough?
