shoot57 Posted March 7, 2013 Report Share Posted March 7, 2013 Just been full length sizing some once fired 243 cases and measured the case length and they averaged out at 2.035 and the book length states 2.045, how common is this?, been loading the 243 for quite a while now and i notice this regularly, i used to load 223 and found the same with those cases too, makes me wonder weather to trim or not Quote Link to comment Share on other sites More sharing options...
phaedra1106 Posted March 7, 2013 Report Share Posted March 7, 2013 Have a read of this thread, http://www.thestalkingdirectory.co.uk/showthread.php/58524-Case-trim-length Quote Link to comment Share on other sites More sharing options...
shoot57 Posted March 7, 2013 Author Report Share Posted March 7, 2013 thanks for the thread Quote Link to comment Share on other sites More sharing options...
kent Posted March 8, 2013 Report Share Posted March 8, 2013 I don't trim unless I have to. I don't even think it has a meaningful effect on accuracy if you batch up slight uneven lengths, as long as its not too long. Some even make a cast of their chamber to get the trim length required measured and exceed the maximum length spec in that particular gun if they can. Quote Link to comment Share on other sites More sharing options...
al4x Posted March 8, 2013 Report Share Posted March 8, 2013 2.035 is about what I would trim to if I was going to but in practice I've just done a set of lapua and that was only just getting to over 2.045 after about 4 firings Quote Link to comment Share on other sites More sharing options...
cockercas Posted March 8, 2013 Report Share Posted March 8, 2013 I trim mine to 2.040. Quote Link to comment Share on other sites More sharing options...
Dougy Posted March 8, 2013 Report Share Posted March 8, 2013 Can't you just neck size, that will reduce the case stretch And only FL when its really nessasary,ie; when its starting to get a little tight closing the bolt Quote Link to comment Share on other sites More sharing options...
cockercas Posted March 8, 2013 Report Share Posted March 8, 2013 Just been full length sizing some once fired 243 cases and measured the case length and they averaged out at 2.035 and the book length states 2.045, how common is this?, been loading the 243 for quite a while now and i notice this regularly, i used to load 223 and found the same with those cases too, makes me wonder weather to trim or not Btw, 2.045 is MAX case length (in the book anyway) Quote Link to comment Share on other sites More sharing options...
big chop Posted March 9, 2013 Report Share Posted March 9, 2013 I don't trim unless I have to. I don't even think it has a meaningful effect on accuracy if you batch up slight uneven lengths, as long as its not too long. Some even make a cast of their chamber to get the trim length required measured and exceed the maximum length spec in that particular gun if they can. you will see a difference if you shot you inconsistant cases over a chrono mate,the SD will be higher,we tried it last week Quote Link to comment Share on other sites More sharing options...
kent Posted March 9, 2013 Report Share Posted March 9, 2013 (edited) you will see a difference if you shot you inconsistant cases over a chrono mate,the SD will be higher,we tried it last week I don't actually, I used to be obsessive about it though. when trying things run only one change over the chrony and onto paper and you find a lot of BS is bounded about on here say. Different brass batches? then that's not something I don't do, even mixed usage of the same brass batch there is always the chance that your gun wants it that way though Edited March 9, 2013 by kent 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.