For 1 thing, Headspace Cannot be "Calculated" ! It must be measured with a precision set of hardened gauges. AS for bullet seating depth , it has been explained on G&G many times using a case with a split neck and a bullet and a cleaning rod to see where exactly your bullets touch the rifling and then adjusting back from there taking measurements with calipers or Micrometers depending on what you have...for proper bullet seating depth on non-cannelured bullets.
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For 1 thing, Headspace Cannot be "Calculated" ! It must be measured with a precision set of hardened gauges. AS for bullet seating depth , it has been explained on G&G many times using a case with a split neck and a bullet and a cleaning rod to see where exactly your bullets touch the rifling and then adjusting back from there taking measurements with calipers or Micrometers depending on what you have...for proper bullet seating depth on non-cannelured bullets.
Do I detect a note of GROUCHY here or is it just me? "Calculated", "measured", all the same! Bullet seating, not to worried about figuring that out. Head spacing on the other hand, yes, I'm worried. In conclusion to your response, YES, I will need to fork out the dough!
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Do I detect a note of GROUCHY here or is it just me? "Calculated", "measured", all the same! Bullet seating, not to worried about figuring that out. Head spacing on the other hand, yes, I'm worried. In conclusion to your response, YES, I will need to fork out the dough!
calculated and measured do not mean the same thing, at least not in the English I use.
You are confusing bullet seating depth with head space. They are 2 entirely different things, bullet seating depth has to do with how far the bullet is seated in the case and can be calculated. Head space is the distance from the head of the cartridge to the bolt face and is set at the time the barrel is chambered and this measument is taken for several places according to the type of cartridges it is. So if you are haveing head space problems you have far more troubles than bullet seating depth.
Steve
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You are confusing bullet seating depth with head space. They are 2 entirely different things, bullet seating depth has to do with how far the bullet is seated in the case and can be calculated. Head space is the distance from the head of the cartridge to the bolt face and is set at the time the barrel is chambered and this measument is taken for several places according to the type of cartridges it is. So if you are haveing head space problems you have far more troubles than bullet seating depth.
Steve
Yip! I know they are two different things. I was/am looking for a way to "measure" case/head space without purchasing another gadget.
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Im not Grouchy !!! LOL I'm telling you like it is and always will be...
You use a calculator for calculating !
you use a measuring device or gauge for measuring.
We have no clue as to what gun or caliber you are dealing with either so its hard to give more than general replies...
Rich
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I think we all need a little more information about what you are trying to do and what kind of firearm this little exercise is about to be able to give you any meaningful information.
If for instance you are talking about reloading for a bolt action rifle you could fire a round in the rifle so you would have a once fired case. You could then do the minimum amount of neck sizing to allow it to chamber again in that same rifle. You could then assemble a dummy cartridge with that case and the bullet ( loosley assembled) you intend to load (no primer installed). If you then seat the bullet without crimping and leave long enough that it contacts the rifling. When you chamber the dummy round then the bullet will be pushed back into the brass to the absolute overall dimension that would chamber in that rifle. You would then want to set up your seating die to the necessary depth that would safely accomodate the distance off of the rifling that you are attempting to achieve.
" In conclusion to your response, YES, I will need to fork out the dough! "
For you, perhaps that would be best. ???
But in Moose's defence, a great many of us reloaded a lot of years before the price of even dial calipers got low enough for us to afford them. None of us waited for RCBS to market their Precision Case Mics or StoneyPoint/Hornady to come out with their case measurement tools but we were quite safe anyway because we knew what we were doing.
As for 'splitting hairs", this IS a technical activity and the words DO have specific meanings. Few of us have much patience in trying to decide if someone means what he says or if he really means something else. ??
For future reference, I'm not in possession of any serious bones so ya'll can fire away. I will refer you to my avatar.
I have been cursed with a desire for perfection. I don't even have my reloading equipment yet but when it gets here, you can bet that I will strive for the best accuracy that I have control of. The caliber is 30-06, bolt-action. In my world, measuring and calculating go hand in hand as nothing is just as simple as taking a measurement.
I still get the felling that I will have to spring for mic to "measure" my fired brass and so on and so forth.....
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If you're even considering reloading without purchasing a good dial caliper, just leave the stuff in the box and come back to it at a later time. A reloading manual is your first purchase, and then a good quality dial caliper is your second.
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Headspace is a different animal and has NOTHING to do with bullet seating depth.
Bullet seating depth has nothing to do with Headspace.
Your Gun is Headspaced from the factory to SAAMI specs.
You dont even need to worry about headspace unless your spent cartridges start blowing apart at the rear end, and I have never seen a gun that went bad in the headspace department unless the locking lugs wore out on the bolt...the barrel throat/and rifling will wear out first after so many 1000's of rounds usually before that happens
Oh and you can buy Calipers for around 6 bucks at Harbor freight or Northern tools.
You need them for case length and COAL measurements.
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Last edited by Mooseman684; 03-05-2011 at 07:14 PM.
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Who's English? 
