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Mar 25th, 2012
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Trouble with new Lapua brass #6981318
12/03/17 11:41 PM
12/03/17 11:41 PM
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I just ran into an issue that I never have before. Iíve got a Tikka T3 6.5x55 that Iíve been loading for for a few years. Iím currently fire forming a new batch of brass. While at the lease this weekend I noticed that while chambering a round the bolt is difficult to close. Inspected the case and the shoulder is dented. Tried the next 2 in the magazine and got the same result. Iíve shot 80 of this new batch and not had a problem until today. These cases have only been neck sized. So my questions are 1) why do you think Iím running into this issue? 2) do you think theyíre safe to shoot?

Thanks for any help.

Re: Trouble with new Lapua brass [Re: Growley] #6981349
12/04/17 12:01 AM
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Safe to shoot if you can close the bolt without breaking sometthing (as in Remington 700 bolt handles).

When you employ neck sizing, you're going to have to bump shoulders back after several firings either by FL sizing or using a body die.




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Re: Trouble with new Lapua brass [Re: Growley] #6981355
12/04/17 12:05 AM
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Then again, after more carefully reading about your experience there could be more to it.

Lack of lubrication can make bolt closure difficult, but not cause shoulder dents. Hmmm...




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Re: Trouble with new Lapua brass [Re: Growley] #6981362
12/04/17 12:15 AM
12/04/17 12:15 AM
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Originally Posted By: Growley
the bolt is difficult to close.



These cases have only been neck sized.


The first one is because of the second one.



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Re: Trouble with new Lapua brass [Re: Growley] #6981375
12/04/17 12:22 AM
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You are probably right JG...but if I'm reading this right it's new brass, and all the ammo loaded before chambered fine. And there's the "dented" shoulders...whatever that could mean. Kinda sounds like crap building up in the lug recesses creating a tighter headspace situation. I dunno though. Maybe we need more info.




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Re: Trouble with new Lapua brass [Re: RiverRider] #6981380
12/04/17 12:27 AM
12/04/17 12:27 AM
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Originally Posted By: RiverRider
Maybe we need more info.


Imma go with that.



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Re: Trouble with new Lapua brass [Re: Growley] #6981413
12/04/17 12:54 AM
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Yes, itís brand new brass. I neck sized them because a few of the case mouths were dented. Iíve been through 80/100 with no problems. The gun has a total of 260 rds through it. 25 or so since the last cleaning.

Re: Trouble with new Lapua brass [Re: Growley] #6981428
12/04/17 01:00 AM
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I think I'd just bump the shoulders on the next go round and keep on truckin.




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Re: Trouble with new Lapua brass [Re: RiverRider] #6981481
12/04/17 01:33 AM
12/04/17 01:33 AM
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Originally Posted By: RiverRider
I think I'd just bump the shoulders on the next go round and keep on truckin.


-.002" for sure



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Re: Trouble with new Lapua brass [Re: Growley] #6981497
12/04/17 01:46 AM
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Ok thanks guys. Iím going to pull the bullets on everything I have left and bump them back. Iím going to shoot the 3 dented ones.

It just didnít make sense why I got through most of that batch of brass without a problem and then this. Thanks again.

Last edited by Growley; 12/04/17 01:48 AM.
Re: Trouble with new Lapua brass [Re: Growley] #6981554
12/04/17 02:25 AM
12/04/17 02:25 AM
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Lapua makes very fine brass, but maybe they're not 100% perfect. That, and you may just have a tight chamber. Once you get your die set to a .002" shoulder bump, I would run any new brass through it from now on.



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Re: Trouble with new Lapua brass [Re: Growley] #6981563
12/04/17 02:29 AM
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Will do. Thanks.

Re: Trouble with new Lapua brass [Re: Growley] #6981632
12/04/17 03:26 AM
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What do the dents look like? Good suggestions above but I would also clean the chamber just in case something got in there and is stuck to the chamber wall at the neck.

Re: Trouble with new Lapua brass [Re: Growley] #6981672
12/04/17 03:56 AM
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Yeah I need to take a closer look at the chamber. I looked while I was out there but I could have missed something.

Re: Trouble with new Lapua brass [Re: Growley] #6981929
12/04/17 02:45 PM
12/04/17 02:45 PM
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Your picture shows why it's not chambering. The dents, and maybe the bullet engaging the rifling. Holy cow, those are seated long! Why so long?



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Re: Trouble with new Lapua brass [Re: Growley] #6981970
12/04/17 03:07 PM
12/04/17 03:07 PM
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I finally just got a decent light in there and there was a good amount of buildup just as kmon1 suggested. Cleaned it up and the problem is solved. Surprises me that it was like that. I thought I have a pretty good system as far as the cleaning goes. Iíll be paying a lot closer attention from now on.

Chad, this Swede has a long throat. Those are .020 off the lands.

Re: Trouble with new Lapua brass [Re: Growley] #6981977
12/04/17 03:12 PM
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20 gauge shotgun mop fits snug inside an action.



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Re: Trouble with new Lapua brass [Re: Growley] #6981987
12/04/17 03:19 PM
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Very cool. Thanks! I appreciate all of the help from everyone.

Re: Trouble with new Lapua brass [Re: Growley] #6982029
12/04/17 03:41 PM
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Originally Posted By: Growley
Chad, this Swede has a long throat. Those are .020 off the lands.


Yes. It looks like you are running a Hornady SST. With them seated that long, there can't be much bullet in the case. I'd worry about the neck holding enough of the bullet to keep it secure. With that SST bullet, it's not seating depth sensitive, so there's really no need to seat it out that far. And if it's a hunting gun, those bullets won't stay straight long in the field. That would be my only concern.



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Re: Trouble with new Lapua brass [Re: Growley] #6982071
12/04/17 04:00 PM
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Gotcha. Yes, 140gr SST. I donít recall exactly what it was but I measured to see how much of the bullet was in the case and it was around .260. I just started using SSTís when I got the new box of brass. Before that I had always used 140gr Partitions and Iíd seat them .020 off as well. I havenít had any issues so far but I trust what you say. How deep would you seat them? And yes, it is just a hunting gun.

Last edited by Growley; 12/04/17 04:01 PM.
Re: Trouble with new Lapua brass [Re: Growley] #6982138
12/04/17 04:46 PM
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If you have .260" of bullet in the case, then that should be alright. My rule of thumb is atleast bullet diameter needs to be held by the neck. So, .260" is right there. And Lapua brass is known for firm necks. If it shoots good and the bullet is firm in the case, roll it!



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Re: Trouble with new Lapua brass [Re: ChadTRG42] #6982165
12/04/17 05:06 PM
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Originally Posted By: ChadTRG42
If you have .260" of bullet in the case, then that should be alright. My rule of thumb is atleast bullet diameter needs to be held by the neck. So, .260" is right there. And Lapua brass is known for firm necks. If it shoots good and the bullet is firm in the case, roll it!


Curiosity on my part, never loaded anything out that far. The SST's are a boat tail design, I'm assuming the boat tail is included in that .260" of bullet in the case, which isn't really held by the neck?


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Re: Trouble with new Lapua brass [Re: Growley] #6982172
12/04/17 05:10 PM
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^^ No, I don't count the boat tail. It has to be the actual amount of bullet that the neck is holding.



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Re: Trouble with new Lapua brass [Re: Growley] #6982282
12/04/17 06:32 PM
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Now Iím wondering so Iím going to measure them again when I get home.

Re: Trouble with new Lapua brass [Re: Growley] #6982584
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Ok, so I just measured a few. Not counting the boat tail they are .224 in the neck. If I seat them to .264 that will be .060 off the lands. Again, Iíve been doing this for some time with this gun and not had a problem, but you fellas have a ton more experience and knowledge than me, so if you say I should do it then I am listening.

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