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Button Buck
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Last Login: 5/1/2008 7:30:53 PM
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i would like to know the best way to find
the point at which the bullet comes in contact with the
rifleing in the barrel.from what ive read this is the best way
to determine the C.O.A.L. by backing of.o15 or so from
where the bullet contacts the grooves.....also any reloading info
for a .223 NEF.
''RUN RABBIT RUN''
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Trophy Buck
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Sorry man I have to refer you to http://www.hornady.com/
I will also copy your message and send it to a friend in the reloading industry.
-NerdHick
________________________________________________________________
http://www.ndarchery.com
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Gameskeeper
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It varies on gun barrel manufactor. Check Hornady's website along with Barnes, Sierra, Speer, and others like Winchester and Remington, they all will have the information you are looking for. On reloading you'll do a lot of reading, you'll refur back to those pages often and books. I use Sierra's latest book when getting my load info for my rounds. It is a lot of fun!
On the NEF, I had a 243 NEF once...I was able to barely put the bullet in the casing, I had plenty of room before it hit rifling.
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Trophy Buck
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Last Login: 11/13/2008 12:26:10 PM
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I've read several different ways to make that measurement. Like Jason said look around and read up on it. Then use the method that suites you best. I tried several methods just to make sure I know where it was at.
_____________________________________________________________
"Buy ammo.....it's the currency of the future", TCM
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Trophy Buck
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Woodsman
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Stoney Point makes a good guage that measures where the bullet ogive hit the rifling. It uses a modified cartridge case you get from them and uses your bullets. It also requires a small tool that connects to your calipers to measure the base to ogive length. Then back it off .010-.015 for the loaded round. Some VLD bullets like to touch the lands. Sometimes the cartridge can get too long for the magazine and has to be single loaded, or find a mag length load that works for your firearm. (match AR shooters generally do this for rapid fire, prone and standing aren't a problem)
Sinclair has a simple one that if you look at it, you realize you can make one. Just a rod with some clamps.
Sarge
SARGE
If it's big and brown, it's dead and down!
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Button Buck
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Last Login: 5/1/2008 7:30:53 PM
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hey thanks....are diferent brands of the same weight diffent in length.
for instance im loading from a speer manual but loading hornady 40gr
v-max bullets.i can not push the hornady lead in as far as the manual
calls for...it sinks plum down in the neck at that far...so im thinking the speer
lead must be shorter.i have found that the speer 50gr TNT pushed down
to 2.230 groups at under an inch at 100yds using 26.5grs of powder..close enough
for a coyote.
''RUN RABBIT RUN''
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Woodsman
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Yes, different brands of the same weight bullet can be different lengths. That is why when you change bullet manufacturers you have to reset your bullet seater.
I also use the Stoney Point COL system for loading all of my calibers. It makes it easy to custom build a load for your firearm based on the dimensions of the gun's chamber. I set mine .015 from the lands as I load my shells within .1 grains of maximum
Todd Segner
Life Member NAHC, NAFC,5 yr Member Buckmasters,Member NAFA,VP, Archery @ ICB&GC,PSE Field Staff,Mossy Oak Pro Staff - Whitetail Pursuit,TRU Ball Releases,HIPS Targets Pro Staff
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Button Buck
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Last Login: 5/1/2008 7:30:53 PM
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ok so its best to set the COAL to your chamber and not so much
to the length given in the reloading manual for any given weight. ive also read that you can use
your cleaning rod and a magic marker to find COAL, by running the rod
down the barrel til it gets to the bolt face,mark it,push your lead into the barrel
with a pencil..run the rod back down the barrel and mark it..them measure the distance
between the lines ,back off .015 and youve got you COAL.sounds like it should work.
any ideas?
''RUN RABBIT RUN''
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