Neck/chamber clearance
- Thread starter RTTY
- Start date
I made some 6,5x47 Lapua case from 6,5 Creedmoor only for test, and now I can try, but my dubt are for the crearance between the neck and the is area chamber...
I don't have stuff for tuning the neck so my choice for 6,5 Creedmoor instead of 308W...
Thanks
Don't forget that there is springback. That .294 is after the brass has sprung back a little. So your clearance is actually more than .002. . . and that amount is just fine.
The minimum chamber dimension is 0.2933 per CIP. The maximum cartridge is 0.2913 so the expected minimum is 0.002 which what you have. As noted you actually exceed that due to springback.
Yes, springback...
.0005" or more?
I load 3 ammo, and I thing to shoot a the end of the range day...
So if this stuck on the chamber I work with this a the home...
Thanks for the advice, hope no trouble a the range on majority for the comments from the other shooters that have on some arguments, like reforming from other calibers, opinions a little bit "taleban"...
If you can slip a bullet into the fired case you're good. I not you need more clearance.
Hello, please can you explain better?
I never fired anmunition made with formed cases...
He's saying once you have fired one of your formed cases, remove it from the chamber and take a bullet and see if you can slip it into the fired case's neck. If you can slide the bullet into the fired neck by hand you have enough clearance in your chamber.
It has to be brass fired in the subject rifle. One or two pieces of fired brass, see if you can slip a bullet in the unsized case.
.002” may not be enough with some bullet powder combinations and you’ll run into pressure problems in the summer. But you need to be sure of your dimensions. How accurate are your measurements? What are you using to measure? Is your test brass new or once fired? Who cut your chamber? Can you call and get the reamer dimensions?
Hello, past sunday I made a trip to the shooting range, 99 rounds.
A the return at home I made the bullets test at the original 6,5x47 Lapua cases (I don't have had time for reloading the reformed cases from 6,5 Creedmoor), on 4 rounds, that have caused a gummy opening of the bolt I misurated .015" neck tickness.
The bullets don't drop on the fired neck...
A the return at home I made the bullets test at the original 6,5x47 Lapua cases (I don't have had time for reloading the reformed cases from 6,5 Creedmoor), on 4 rounds, that have caused a gummy opening of the bolt I misurated .015" neck tickness.
The bullets don't drop on the fired neck...
Hello, for now I place the 4 cases on the desk drawer, and think what neck turning can buy.
21st Century are out of budget for my usage, so I think K&M or Sinclair but look also at RCBS, Forster and Hornady, some advices for help my selection?
Thanks, Camillo
