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#6600490 - 12/23/16 07:27 PM ejector swipe
Hunter80 Offline
Bird Dog

Registered: 08/01/10
Posts: 379
Loc: DFW
I was shooting today and noticed my cases had ejector swipes and bolt lift was a little heavy. I've shot this load many times before with no issues. Any thoughts?

308 Win
43.0gr IMR 4064
Lapua 3x fired brass
175 SMK
CCI BR2 Brimer


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#6600496 - 12/23/16 07:30 PM Re: ejector swipe [Re: Hunter80]
Judd Offline


Registered: 01/22/09
Posts: 11539
Loc: Sachse, TX
Your primer is cratered too. Load is too hot...humidity is as bad as heat and today the humidity was high.

You need to back it down a bit.
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#6600533 - 12/23/16 07:48 PM Re: ejector swipe [Re: Hunter80]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 7537
Loc: Wise Co.
New jug of powder?
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#6600544 - 12/23/16 07:53 PM Re: ejector swipe [Re: Hunter80]
Hunter80 Offline
Bird Dog

Registered: 08/01/10
Posts: 379
Loc: DFW
I didn't think this was near a published max load guess I'll need to look at my manuals again. I came up with that load while doing an OCW test last year and 43.0 grains provided the best accuracy. It was not a new jug of powder it was the same powder jug I've loaded out of before.

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#6600551 - 12/23/16 07:59 PM Re: ejector swipe [Re: Hunter80]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 7537
Loc: Wise Co.
If you've changed bullet seating depth to jam the lands, but you did not do this before, you could easily have driven pressures up beyond 65000 psi.
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Originally Posted By: Ronald Reagan
It's not that liberals are not smart, it's just that so much of what they know isn't so.

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#6600553 - 12/23/16 08:01 PM Re: ejector swipe [Re: Hunter80]
Hunter80 Offline
Bird Dog

Registered: 08/01/10
Posts: 379
Loc: DFW
this is being shot out of a factory model 700 BDL so I can't get anywhere near the lands

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#6600558 - 12/23/16 08:09 PM Re: ejector swipe [Re: Hunter80]
Hunter80 Offline
Bird Dog

Registered: 08/01/10
Posts: 379
Loc: DFW
According to my Sierra manual max load is 42.8gr

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#6600596 - 12/23/16 08:31 PM Re: ejector swipe [Re: Hunter80]
Creedmoor Offline
Pro Tracker

Registered: 09/12/16
Posts: 1086
Originally Posted By: Hunter80
According to my Sierra manual max load is 42.8gr


That doesn't mean squat.

Brass variances, powder lot variances, seating depths, chamber dimensions ...... the published data is a GUIDELINE. And you already knew that. wink

No matter what the cause, that load is definitely pushing the envelope. Like already said, back it off a bit.
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#6600618 - 12/23/16 08:44 PM Re: ejector swipe [Re: Hunter80]
Judd Offline


Registered: 01/22/09
Posts: 11539
Loc: Sachse, TX
Berger manual says 42 is max but they are notorious for being conservative and I normally start near max. So it's hot but wouldn't expect it to be that hot. Humidity sucks.
_________________________
Originally Posted By: Phil Robertson
Don't let your ears hear what your eyes didn't see, and don't let your mouth say what your heart doesn't feel

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#6600636 - 12/23/16 08:57 PM Re: ejector swipe [Re: Hunter80]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 7537
Loc: Wise Co.
Between burn rate variations of different powder lots, case capacity, proximity to the lands, and a tight chamber you can get in trouble quick. And you can do it using published data, too.
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Originally Posted By: Ronald Reagan
It's not that liberals are not smart, it's just that so much of what they know isn't so.

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#6600638 - 12/23/16 08:59 PM Re: ejector swipe [Re: Hunter80]
maximum Offline
Pro Tracker

Registered: 09/30/09
Posts: 1736
Originally Posted By: Hunter80
According to my Sierra manual max load is 42.8gr


Originally Posted By: Hunter80
. . .43.0gr. . .


just curious-
what does 43.0 grains do that 42.8 wouldn't ?

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#6600654 - 12/23/16 09:09 PM Re: ejector swipe [Re: maximum]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 7537
Loc: Wise Co.
Originally Posted By: maximum
Originally Posted By: Hunter80
According to my Sierra manual max load is 42.8gr


Originally Posted By: Hunter80
. . .43.0gr. . .


just curious-
what does 43.0 grains do that 42.8 wouldn't ?


Well then, what does 42.8 do that 42.6 will not? When you're seeing presdure signs like that you're likely to be up near 70000 psi. What good would a .2 grain decrease do? Just because it's in a manual does not make it safe in every gun to begin with.
_________________________


Originally Posted By: Ronald Reagan
It's not that liberals are not smart, it's just that so much of what they know isn't so.

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#6600660 - 12/23/16 09:12 PM Re: ejector swipe [Re: Hunter80]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 7537
Loc: Wise Co.
What im saying is that a .2 grain decrease is not likely to bring pressures down to the "safe" range, that's all.
_________________________


Originally Posted By: Ronald Reagan
It's not that liberals are not smart, it's just that so much of what they know isn't so.

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#6600676 - 12/23/16 09:22 PM Re: ejector swipe [Re: RiverRider]
maximum Offline
Pro Tracker

Registered: 09/30/09
Posts: 1736
Originally Posted By: RiverRider
What im saying is that a .2 grain decrease is not likely to bring pressures down to the "safe" range, that's all.


still curious though.
why would you exceed max load ?
more accurate ?
less recoil ?

educate me. i've never needed to load over max.
just wondering why.

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#6600689 - 12/23/16 09:32 PM Re: ejector swipe [Re: Hunter80]
WileyCoyote Offline
THF Trophy Hunter

Registered: 09/01/04
Posts: 5361
Loc: The Dogwood Capital of Texas
I don't remember the particular of the load but I had a screamer worked up out of a SAKO 1st Gen Classic Grade 270 AV that all my brass looked that way & by the 3rd firing most of the print on the case head rim was unreadable in WW brass...and I threw the brass away after the 3rd loading as the primer pocket was too loose. THAT load was stupid fast, and stupid dangerous too but was doing -1" groups at 250 yards with a Leo 3x9 Vari X III Duplex on top.

A cooler head at the range I respected "got my attention" after picking up one of my spent rounds...and asking how much Life Insurance I had...and wanted to know if he could get a Life Insurance Policy on me too. HUH???
Ron
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