marksman wrote:full length size the case so there is no effort closing the bolt with the case just effort for the projectile
doing the measurement this way with the firing pin removed has no interference and is the best way for a true measurement
seat the bullet too long and try it in the chamber,
keep adjusting your die back down until you have about 1/4 inch drop to close the bolt fully
this is close enough for a true measurement from the ogive to the case base at this time
down the track your throat will move
use this case as a dummy round for touching the lands
http://www.youtube.com/watch?v=TWmIwPwLyyg&t=160s
grandadbushy wrote:Mate check your brass length it may need trimming , or something in the breach fowling the brass
once a shell has been sized normally it fits ok
Have you used the Full length die before if not check it is not faulty as something is amiss
grandadbushy wrote:Diddums I've used a 22-250 for years and do the lands thing the old bush way very easy
1...get an empty shell
2....size it
3...put a projectile into the shell just a bit and shade in the projectile in with a niko pen
4....then put bullet into the chamber and bring the bolt to it ever so lightly until it stops
5....remove bullet and check the projectile to see if there are any marks on it as it will scratch the pen ink when it touches the lands
If it has marks on it put it back into the press and push the projectile into the shell further and try it in the chamber again
you may do this may times until you can close the bolt and have no marks on the projectile
You will be able to see when you are getting close to the right length by how far the bolts goes in , when you're close take it very slowly
When the bolt shuts and the marking of the projectile stops then its very close to the lands
Hows that clear as mud hey
Diddums wrote:But I must say that when I load my rounds to 59.5mm COAL I can still shoot groups under 1 MOA.
I just want to see where they are sitting in regards to the lands.
Stix wrote:Diddums...you say you feel it with anything in the chamber--but with the firing pin removed, can you chamber a factory round without resistance...?
Do you have a comparitor set to be able to measure the ogive & shoulder of cartridges...?
If so, measure the shoulder of a factory round & a fired case.
I had an issue with mine recently that turned out to be the extractor needing a good heave to get over the case...thankfully it sorted itself out in relatively short time.
I also found mine to have a very short chamber-so short that i can even feel the occasional factory round when i close the bolt.
Id be interested to know your chamber dimensions...
grandadbushy wrote:Diddums have you just acquired the gun ? if so check the base of the brass to see if it is marked when it is put into the chamber
and the bolt closed then removed
If it is marked I would be inclined to have the head space checked as there has to be a reason the bolt is giving resistance when being closed
with a freshly sized shell
Stix wrote:Can you chamber a fired case...?
Obviously ensure the die is set up correct to fls the cases.
brett1868 wrote:Diddums, if you're Sydney based get in touch and possibly I can help you out. I've got the Hornady gauges and modified case to do the measurements.
Diddums wrote:brett1868 wrote:Diddums, if you're Sydney based get in touch and possibly I can help you out. I've got the Hornady gauges and modified case to do the measurements.
Unfortunately I'm not mate, thanks for the offer though.
I will end up loading for a few different rifles so I think I'll just end up buying the proper gauges.