Grouse Posted August 17, 2015 Report Share Posted August 17, 2015 Anybody else experienced I/D doughnuts in 260 Lapua cases? From new I have used K and M expandiron to uniform necks and ease tension. Then F/L sized with .294" bushing On seating 140gr Amax, some where tight and others felt like a doughnut was present - shot pretty terrible 1.75" groups on known accurate load. Slipping bullet into fired necks on some I have found a doughnut. What is the remedy here please - getting perplexed with this problem! Anyone have a 295 and 296 bushing I could try before I buy some more (neck tension still a wee bit stiff I think?) Regards Grouse Link to comment Share on other sites More sharing options...
1967spud Posted August 17, 2015 Report Share Posted August 17, 2015 give us a ring Rich Link to comment Share on other sites More sharing options...
Scotch_egg Posted August 17, 2015 Report Share Posted August 17, 2015 Spud, dont keep this to yourself. If you have an diagnosis please share. I will be going .260 in the future Link to comment Share on other sites More sharing options...
1967spud Posted August 17, 2015 Report Share Posted August 17, 2015 neck turing using a cttuing pilot to remove central donut at the same time and helping elivoiate by creating a shoulder well with the out side turning Link to comment Share on other sites More sharing options...
mole-e30 Posted August 17, 2015 Report Share Posted August 17, 2015 Is this a tight neck chamber? Link to comment Share on other sites More sharing options...
Grouse Posted August 17, 2015 Author Report Share Posted August 17, 2015 Is this a tight neck chamber? No it's not. In the past I have given necks a 90% clean up cut, but thought on the these new cases not to bother - as others seem to get results not doing it. The neck tension from new seems very high, hence another reason for using expand iron ( now thinking I might use expand iron and see if there is sufficient grip on bullet - without resizing) Link to comment Share on other sites More sharing options...
Grouse Posted August 17, 2015 Author Report Share Posted August 17, 2015 Is this a tight neck chamber? No it's not. In the past I have given necks a 90% clean up cut, but thought on the these new cases not to bother - as others seem to get results not doing it. The neck tension from new seems very high, hence another reason for using expand iron ( now thinking I might use expand iron and see if there is sufficient grip on bullet - without resizing) neck turing using a cttuing pilot to remove central donut at the same time and helping elivoiate by creating a shoulder well with the out side turning Link to comment Share on other sites More sharing options...
Grouse Posted August 17, 2015 Author Report Share Posted August 17, 2015 Is this a tight neck chamber? No it's not. In the past I have given necks a 90% clean up cut, but thought on the these new cases not to bother - as others seem to get results not doing it. The neck tension from new seems very high, hence another reason for using expand iron ( now thinking I might use expand iron and see if there is sufficient grip on bullet - without resizing) neck turing using a cttuing pilot to remove central donut at the same time and helping elivoiate by creating a shoulder well with the out side turning neck turing using a cttuing pilot to remove central donut at the same time and helping elivoiate by creating a shoulder well with the out side turning So use an inside cutter - but not cutting outside. What part of the loading process should this be done? I am using a Redding FL sizer and bushings. The bushings don't resize all the necks length - ways thought this normal ( but now questions are mounting all the time!!) Link to comment Share on other sites More sharing options...
The Gun Pimp Posted August 17, 2015 Report Share Posted August 17, 2015 Surprised you are getting doughnuts with new Lapua 260 brass - usually only occurs when necking up brass. Link to comment Share on other sites More sharing options...
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