Thread: Sticky bolt?

whats with the 3 crimp marks around primer???
we has shitty issues with S&B brass ...it was so plurry hard resizing nearly took handle off press,any other brand is fine....really surprised you would have issues with lapua brass...its supposed to be the good shit is it not???? be a shame to chuck good brass if its not the issue.

Originally Posted by Micky Duck

whats with the 3 crimp marks around primer???
we has shitty issues with S&B brass ...it was so plurry hard resizing nearly took handle off press,any other brand is fine....really surprised you would have issues with lapua brass...its supposed to be the good shit is it not???? be a shame to chuck good brass if its not the issue.

Yeah had the same issue as the OP (hard bolt lifts) but with S&B factory rounds. Horrible ammo. Changed to Hornady superformance and no more issues.

Originally Posted by Micky Duck

whats with the 3 crimp marks around primer???
we has shitty issues with S&B brass ...it was so plurry hard resizing nearly took handle off press,any other brand is fine....really surprised you would have issues with lapua brass...its supposed to be the good shit is it not???? be a shame to chuck good brass if its not the issue.

Military brass has the primer crimped in

Small base die to fix it?

Greetings again Kiwijames,
I very much doubt if the problem is purely case related. It is more likely to be a combination of things perhaps a rifle/loading problem. It is hard to diagnose when the patient is not present and I see that we both live in Hawkes Bay. If you feel like having a look at the problem with me send me a PM. We might both learn some thing.
Grandpamac.

so its military lapua brass???
a quick twirl with champher tool removes it nicely and helps primer slip in well too.

That brass case head and the primer look very rough to me. Is the inside of the chamber completely free of rust or other crud? If its rough all sorts of bad shit can happen , including jammed case.

Have a look inside your chamber, could be some crud in there that the case is expanding into and locking things up.

ok dumb question here...you MIGHT have answered your own query.... lapua MILSERP BRASS.....now correct me if Im wrong but isnt milserp brass thicker with less internal capacity so loads should be reduced a little???? or do the military use civi lapua brass to civi specs??

Originally Posted by Micky Duck

ok dumb question here...you MIGHT have answered your own query.... lapua MILSERP BRASS.....now correct me if Im wrong but isnt milserp brass thicker with less internal capacity so loads should be reduced a little???? or do the military use civi lapua brass to civi specs??

I can't say to be certain. @Tentman certainly has me thinking though. I wasn't expecting to be that close to max. The cases are only just compressed with my load which corresponds to listed data suggesting the WC is not that far from normal.

Originally Posted by Micky Duck

ok dumb question here...you MIGHT have answered your own query.... lapua MILSERP BRASS.....now correct me if Im wrong but isnt milserp brass thicker with less internal capacity so loads should be reduced a little???? or do the military use civi lapua brass to civi specs??

This too - again easy to model on Quickload, if you care to measure a empty case, then one filled with water (level to case mouth, knock of any meniscus) I'll run it for you (barrel length required too) You could also compare the result with "other brass".

I'd agree that 46.0 gns of 2208 shouldn't be giving you problems, in "standard brass" its indicated at 61848 psi (just be aware CUP are not the same as psi) for 2724 fps at 18" of barrel.

Originally Posted by Tentman

This too - again easy to model on Quickload, if you care to measure a empty case, then one filled with water (level to case mouth, knock of any meniscus) I'll run it for you (barrel length required too) You could also compare the result with "other brass".

I'd agree that 46.0 gns of 2208 shouldn't be giving you problems, in "standard brass" its indicated at 61848 psi (just be aware CUP are not the same as psi) for 2724 fps at 18" of barrel.

OK just did a weigh up
Lapua mil brass (23 pieces)
173.8g average weight
0.6g SD
2.6g max variation

Federal brass (18 pieces)
176.3g average weight
1.06 SD
4.0g max variation

Lapua brass 52.2g WC

If you could please run this through Quikload that would be very interesting.
Cheers
James

Lapua ex military brass can be absolute crap, not the same as the brass you buy to reload with

It is designed to be fired once, anything else is a bonus

Have you weighed any & compared it to normal Lapua 308 brass ?

Originally Posted by Kiwi Greg

Lapua ex military brass can be absolute crap, not the same as the brass you buy to reload with

It is designed to be fired once, anything else is a bonus

Have you weighed any & compared it to normal Lapua 308 brass ?

I think a start from new is a good place to start. I'm going to run CFE223 in the next trial. Any suggestions on brass? It's a hunting rifle so I do throw a bit into the grass/Manuka/random scrub that can't be recovered so less than premium brass may be the next choice.

Originally Posted by kiwijames

I think a start from new is a good place to start. I'm going to run CFE223 in the next trial. Any suggestions on brass? It's a hunting rifle so I do throw a bit into the grass/Manuka/random scrub that can't be recovered so less than premium brass may be the next choice.

Lapua 308 brass is generally pretty well priced compared to others