Been trying to reload some lapua brass for a 6br.They are not forming to the chamber like it should.Loading with 29.3 grs of vv n135,70 gr smk,lapua brass.Brass was new when I started, I've loaded 15 rounds 3 times each and none of them formed.Lot # on brass is hadn't heard abuot that lot being bad.Sent the gun back to factory to get it checked out.Factory could not find any defects with gun.Right now only thing sealing the breach is the bolt face.
bad brass?
- Thread starter blinky
- Start date
QuickLOAD shows your load as 36940 PSI. It would seem to be way under pressure. I don't think you can get enough N135 in that case to perform properly. That would even be a light load if it were N133 but at least it would be up above 46 KSI. Consult a loading manual for 70 grain starting loads and work up from there.blinky said:
dansig
I use 33.5gr N135 behind the 70gr SMK in my 6mm BR, it works great.
you should try the 68gr Berger match bullet, I find it to be much better in my BR than the SMK.
you should try the 68gr Berger match bullet, I find it to be much better in my BR than the SMK.
jonbearman
I live in new york state,how unfortunate !
Try this,buy a pound of h322 and start with 27.0 grains and the 70 grain bullet. Problem solved. Keep in mind to check with the sierra manual as this load works in my rifle and may be to hot for yours. What book did you get that load from originally? I seem to remember that the VV manual had some big mistakes in it and they published a warning.It may have nothing to do with the 6br loading,but I would use the latest sierra manual whan working with their bullets.
KEVIN THOMAS PLEASE CHIME IN.
KEVIN THOMAS PLEASE CHIME IN.
The Vihtavuori website give the loads for a 70 gr. bullet and V135 as 29.0 - 33.0 grains. Shoot a few working up in 0.3 grain increments from 29.3 and see if it gets better. Watch for signs of pressure.
The website is off line now for an update. I couldn't get on the website to verify the powder charge range. I had it in my handwritten notes. I have shot 70 gr. Sierra HPBT in my 6BR with 32.0 grs of V135 without signs of pressure. I have never gone higher.
http://vihtavuori-lapua.com/
The website is off line now for an update. I couldn't get on the website to verify the powder charge range. I had it in my handwritten notes. I have shot 70 gr. Sierra HPBT in my 6BR with 32.0 grs of V135 without signs of pressure. I have never gone higher.
http://vihtavuori-lapua.com/
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