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ejector swipe #6600490
12/24/16 01:27 AM
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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


Re: ejector swipe [Re: Hunter80] #6600496
12/24/16 01:30 AM
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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.


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
Re: ejector swipe [Re: Hunter80] #6600533
12/24/16 01:48 AM
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New jug of powder?




I'm here to give and receive knowledge, not affirmation or adoration. If you don't like it, mierda dura. Intellectual honesty is not for fragile egos.
Re: ejector swipe [Re: Hunter80] #6600544
12/24/16 01:53 AM
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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.

Re: ejector swipe [Re: Hunter80] #6600551
12/24/16 01:59 AM
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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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Re: ejector swipe [Re: Hunter80] #6600553
12/24/16 02:01 AM
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this is being shot out of a factory model 700 BDL so I can't get anywhere near the lands

Re: ejector swipe [Re: Hunter80] #6600558
12/24/16 02:09 AM
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According to my Sierra manual max load is 42.8gr

Re: ejector swipe [Re: Hunter80] #6600596
12/24/16 02:31 AM
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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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There's a fine line between BRAVE ... and STUPID.

The two most important days in your life are the day you are born and the day you find out why.
Re: ejector swipe [Re: Hunter80] #6600618
12/24/16 02:44 AM
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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
Re: ejector swipe [Re: Hunter80] #6600636
12/24/16 02:57 AM
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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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Re: ejector swipe [Re: Hunter80] #6600638
12/24/16 02:59 AM
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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 ?

Re: ejector swipe [Re: maximum] #6600654
12/24/16 03:09 AM
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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.




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Re: ejector swipe [Re: Hunter80] #6600660
12/24/16 03:12 AM
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What im saying is that a .2 grain decrease is not likely to bring pressures down to the "safe" range, that's all.




I'm here to give and receive knowledge, not affirmation or adoration. If you don't like it, mierda dura. Intellectual honesty is not for fragile egos.
Re: ejector swipe [Re: RiverRider] #6600676
12/24/16 03:22 AM
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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.

Re: ejector swipe [Re: Hunter80] #6600689
12/24/16 03:32 AM
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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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"These are the times that try men's soul's"...Thomas Paine

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Re: ejector swipe [Re: maximum] #6600698
12/24/16 03:37 AM
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Originally Posted By: maximum
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.


The unvarnished truth: you may be beyond SAAMI pressures in certain situations when following the book and not exceeding the published data, and you might be well within SAAMI pressure spec while exceeding published max charges in other situations. You are ALWAYS on your own, like it or not.




I'm here to give and receive knowledge, not affirmation or adoration. If you don't like it, mierda dura. Intellectual honesty is not for fragile egos.
Re: ejector swipe [Re: maximum] #6600701
12/24/16 03:41 AM
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Originally Posted By: maximum
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.


Who's max load are you speaking of because the Hodgdon max for that bullet is 45.6gr so he is well under that max. Not saying the load is OK just pointing out Max's vary and as mentioned are just guidelines not gospel

Last edited by DStroud; 12/24/16 03:42 AM.

"Anyone taking up handloading necessarily plays with unknown factors and takes chances. But so does anyone who drives a car,goes to a cocktail party,eats in a restaurant,or gets married."

Jack O'Connor 1963
Re: ejector swipe [Re: RiverRider] #6600703
12/24/16 03:43 AM
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Originally Posted By: RiverRider
Originally Posted By: maximum
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.


The unvarnished truth: you may be beyond SAAMI pressures in certain situations when following the book and not exceeding the published data, and you might be well within SAAMI pressure spec while exceeding published max charges in other situations. You are ALWAYS on your own, like it or not.


yes, i understand all that. i've reloaded for
several decades, and thankfully haven't had
any blowups or primer pops, or case ruptures
from my reloads. i did have some winchester
white box split, but none of my own reloaded ammo.

but. . . still curious. is there a reason
for exceeding book max ?

Re: ejector swipe [Re: Hunter80] #6600706
12/24/16 03:50 AM
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In my opinion yes. My load for my 280 Remington is quite a bit over max because the load data was based off lower pressures Remington used to operate the semi-Auto they brought out the cartridge in back in the day.
Same with many older cartridges.


"Anyone taking up handloading necessarily plays with unknown factors and takes chances. But so does anyone who drives a car,goes to a cocktail party,eats in a restaurant,or gets married."

Jack O'Connor 1963
Re: ejector swipe [Re: Hunter80] #6600709
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+1




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Re: ejector swipe [Re: Hunter80] #6600718
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ok . .so extra pressure is needed for proper
function of the action, so a larger charge
is needed ?

Re: ejector swipe [Re: Hunter80] #6600724
12/24/16 04:06 AM
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My 220 and 270 are above what some books call maximum, but they weren't max when they were first worked up, based on the books at that time. And they don't seem to be max now. My 223 with a new barrel hit max way before I got to where the previous barrel was accurate. Opened up the chamber and all is well. The rifle, not the book, will tell you when to back off.

Re: ejector swipe [Re: Hunter80] #6600728
12/24/16 04:08 AM
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No.

The .280 was hamstrung from the beginning with pressure held down to 50,000 CUP (but now 60000 psi) because Remington chambered self-loaders for it. In a bolt gun the cartridge can be pushed as hard as the highest pressured cartridge (.25-06 is rated to 65000 psi, IIRC) based on the .30-06.

Besides...do you KNOW the pressure of any of your handloads??




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Re: ejector swipe [Re: Hunter80] #6600732
12/24/16 04:10 AM
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Okay...I got that wrong. The .25-06 is specced at 63000 psi, but the .270 is allowed 65000 psi.




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Re: ejector swipe [Re: maximum] #6600734
12/24/16 04:11 AM
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Originally Posted By: maximum
ok . .so extra pressure is needed for proper
function of the action, so a larger charge
is needed ?


No just the opposite
The .280 Remington, also known as the 7mm Express Remington, was introduced in 1957 for the Remington model 740, 760, 721, and 725 rifles. They operated at lower pressures than what could be used in a modern bolt gun. So data for them is still based off SAMI specs from 1957.
My loads are safe in my gun but probably would cause problems in an auto loader over time


"Anyone taking up handloading necessarily plays with unknown factors and takes chances. But so does anyone who drives a car,goes to a cocktail party,eats in a restaurant,or gets married."

Jack O'Connor 1963
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