reggiegun Posted August 20, 2010 Report Share Posted August 20, 2010 (edited) Hi, What do you all use to measure chamber length, and how much do you knock off for case sizing? or do you just size to data sheets. Regards, Reggiegun Edited August 20, 2010 by reggiegun Quote Link to comment Share on other sites More sharing options...
Billy. Posted August 20, 2010 Report Share Posted August 20, 2010 Hi, What do you all use to measure chamber length, and how much do you knock off for case sizing? or do you just size to data sheets. Regards, Reggiegun You need to buy a 'modified case' that should help. Quote Link to comment Share on other sites More sharing options...
poontang Posted August 20, 2010 Report Share Posted August 20, 2010 (edited) Have a look at your proof marks. It should be stamped onto the gun. Usually measured in mm, with the gauge preceeding it. i.e 12/76 (12G 3" Chamber). Errr forget the above, should have read it through Edited August 20, 2010 by poontang Quote Link to comment Share on other sites More sharing options...
garyb Posted August 20, 2010 Report Share Posted August 20, 2010 Get yourself a Stoney Point / Hornady OAL guage, with a modified case in your calibre. Quote Link to comment Share on other sites More sharing options...
kent Posted August 20, 2010 Report Share Posted August 20, 2010 Get a case that has been fired but not sized in the chamber. Now close up the neck slightly to only just grip the bullet you are planning to use by forming a pair of small flats on the bench. Colour the bullet with indelible marker and just seat the tail in the neck of the prepared case. insert in carefully by hand into the chamber and close the bolt. Hopefully the bullet wil be forsed back into the caseleaving scratch marks along the ink as it seats into the case, even better it remains in situe in case. Do this a few times and you should then have a basic CARTRIDGE OVERALL LENGTH TO LAUNDS (using that particular bullet). Do not go tight to the launds indeed with most factory guns this will impractical. Note, Doubtless you will have a few fiddles through the process, most likely is leaving the bellet behind in the rifling but provided you havent over tightened the neck it should pop out easy Hope this is what you were asking for Quote Link to comment Share on other sites More sharing options...
the running man Posted August 20, 2010 Report Share Posted August 20, 2010 Get yourself a Stoney Point / Hornady OAL guage, with a modified case in your calibre.listen to garyb,he speaks the truth! There are tedious other methods but why bother! Quote Link to comment Share on other sites More sharing options...
seeker Posted August 20, 2010 Report Share Posted August 20, 2010 If its chamber length for case trim you want, then the Stoney/Hornady case gauge is not the thing ... its for measuring OAL , when you want to seat your bullet ogive. 0.0x" from the rifling etc .. Kent has described another way to do it. Sinclair do a 'Chamber Length gauge' (wonder why they called it that?) which works on a cut down case. They had some at Reloading Solutions last time I went. Looking at my manual the 'Trim-to Length' seems to vary around .010" / 0.2mm below max case length... so check your book for your calibre. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.