mole-e30 Posted May 7, 2014 Report Share Posted May 7, 2014 Hi Folks I am looking to get the throat of my chamber pushed forward, it is very short at the moment. Question is to those that shoot the 180gr VLD bullet, what is your COAL? I have worked out what I think it should be, but want to double check and see if I am in the correct ball park. Thanks in advance Bruce Link to comment Share on other sites More sharing options...
1967spud Posted May 7, 2014 Report Share Posted May 7, 2014 Short like you !!! Ill check mine for you tomoz buddy Link to comment Share on other sites More sharing options...
1967spud Posted May 7, 2014 Report Share Posted May 7, 2014 2.565" to Ogive Link to comment Share on other sites More sharing options...
1967spud Posted May 7, 2014 Report Share Posted May 7, 2014 2.565" to Ogive Thats giving approx 13 thou jump with same bullet Link to comment Share on other sites More sharing options...
triggersqueezer Posted May 7, 2014 Report Share Posted May 7, 2014 my what a long one you have mark Link to comment Share on other sites More sharing options...
mole-e30 Posted May 7, 2014 Author Report Share Posted May 7, 2014 Spud What is the coal, just so I can make sure my gauge is not out Link to comment Share on other sites More sharing options...
1967spud Posted May 7, 2014 Report Share Posted May 7, 2014 3.271 Link to comment Share on other sites More sharing options...
mole-e30 Posted May 7, 2014 Author Report Share Posted May 7, 2014 Thanks Mark Link to comment Share on other sites More sharing options...
1967spud Posted May 7, 2014 Report Share Posted May 7, 2014 No probs staple arse!!! Link to comment Share on other sites More sharing options...
Brad Y Posted May 8, 2014 Report Share Posted May 8, 2014 Using a 220" freebore with a 1.5 degree leade gets the VLD boat tail/bearing surface junction pretty much right at the neck/shoulder junction. This would be considered in the "donut area" so if you have something like this as a throat, then it would pay to either use an expander mandrel to push the donut to the outside of the case then turn it off, use an inside neck reamer, or just size the top half or 2/3rds of the neck so the donut doesnt size down and touch the bullet. This last method is what one of our Aussie shooters Alan Fraser uses for F class- Alan won the second day aggregate at the FCWC in Raton. Ive adopted it and it seems to be fine, though I am inside neck reaming as well to keep the donuts at a minimum. Link to comment Share on other sites More sharing options...
Ronin Posted May 8, 2014 Report Share Posted May 8, 2014 Or undercut the case neck shoulder junction and you don't get donuts at all…. I like mine with coffee Link to comment Share on other sites More sharing options...
Brad Y Posted May 8, 2014 Report Share Posted May 8, 2014 Yes that works if you have a tight chamber that you need to turn to maintain clearance. Mr Faser and I both shoot no turn chambers. Link to comment Share on other sites More sharing options...
garyw Posted May 9, 2014 Report Share Posted May 9, 2014 No probs staple arse!!! Link to comment Share on other sites More sharing options...
.jpg.0972b4e2bdf0b5a4109eb96f2b1b62ad.jpg)
(200x135).jpg.0fd0a94f065c6cb243fdff1b40e0819a.jpg)
Recommended Posts
Archived
This topic is now archived and is closed to further replies.