Not impressed, Sako, damaged cases .2506

southernman · #1 02-03-2010, 07:08 PM

Well have taken the sako finlight out and fired off 50 rounds over last 2 days,
Cases are coming out damaged lip in bent in any idea's on what the cause is.
Also only ejects about 1/3 of rounds. Shell is very loose in bolt claw, if I put a new round in bolt it droops down about 15 deg.
Never had/seen a rifle do that before, anyone know if the grab on the claw in the bolt can be tightened up?
Groops are prety loose but if the pitures come threw you will see why.
Pretty disapointed, Yea I know, its still a mass produced rifle, Abe it a $1600 one. But I expect better from Sako.
Regards Kiwi

southernman · #2 02-03-2010, 07:20 PM

Loose round in bolt.

pikergolf · #3 02-03-2010, 07:31 PM

Are the rounds difficult to chamber? I would guess that there is something in the chamber? Looking at the brass it looks like gas is leaking around that spot. If there is somthing in the chamber it's heavy danger.

Ken07AOVette · #4 02-03-2010, 07:38 PM

Sounds like warranty to me.

What does the dealer say?

noneck180 · #5 02-03-2010, 08:26 PM

That doesn't look good,, stop shooting until you figure out what is wrong,, are those relaods?? looks like a lot of burn back aswell,, those look like they were bent in a vise,, never mind in a chamber.

Sako guys chime in but I think the Sako extractors work like that ??,, but being that the brass is so deformed makes it impossible to eject, ?????

southernman · #6 02-03-2010, 09:19 PM

Ammo used is new federal 120g and 117g , loads as smooth as silk, can't see anything wrong in breach or action. am going to bore scope tommorow, No powder burns that I can see.
Unable to get hold of ddealer today, will try tomorrow.
Can't work out why case is blowing in.

cutthroat666 · #7 02-03-2010, 09:19 PM

NoNeck is right - Sako extractors work like that. The extractor has a sigle claw (I'm sure you know that) and it isn't required to hold the round tight to the bolt face. It really only needs to pull it back until it is ejected.

I just checked mine (7mm Rem Mag) and the brass sits in a similar manner in my bolt if I hold it right.

I think you need to be checking the chamber as well. Maybe if there is not something in the chamber - is there a chunk missing?

Let us know.

cutthroat

#8 02-03-2010, 11:12 PM

Quote:

Originally Posted by cutthroat666

NoNeck is right - Sako extractors work like that. The extractor has a sigle claw (I'm sure you know that) and it isn't required to hold the round tight to the bolt face. It really only needs to pull it back until it is ejected.

I just checked mine (7mm Rem Mag) and the brass sits in a similar manner in my bolt if I hold it right.

I think you need to be checking the chamber as well. Maybe if there is not something in the chamber - is there a chunk missing?

Let us know.

cutthroat

If there was a chunk missing wouldn't the case be bulged out

noneck180 · #9 02-03-2010, 11:33 PM

Keep us posted

cutthroat666 · #10 02-04-2010, 07:44 AM

Quote:

Originally Posted by MTWALLET

If there was a chunk missing wouldn't the case be bulged out

Maybe yes - maybe no. If it is a small pit I believe it would be possible that the casing would not be pushed outward into it but the gas being forced into a pocket that it shouldn't be could push the brass inward near the end of the combustion process.

We are troubleshooting here - you have to be open-minded and look for the unexpected.

cutthroat

solocam · #11 02-04-2010, 07:53 AM

I've seen that before in reloads from the shell not being resized right was the bolt hard to close, if it is factory rounds they could be defective. I've seen shells come from the factory before with hair line cracks in the neck.

Pathfinder76 · #12 02-04-2010, 08:00 AM

With a fixed blade ejector you control how these rounds are coming out of the ejection port. Those bent cases are hitting the rear bridge as they are thrown from the action. If you look close on the right side of the rifle under the rear base you'll most likely see brass markings on the receiver. When these cases aren't ejecting you are most likely not drawing the bolt all the way to the rear or at least doing it gingerly.

solocam · #13 02-04-2010, 08:09 AM

What is that on those casings around the neck they look burnt or dirty?

Dick284 · #14 02-04-2010, 08:42 AM

The extractor is fine, the cases are hitting the receiver as Chuck said.

Booner Sniper · #15 02-04-2010, 08:55 AM

x3 on the case hitting the back of the receiver, happens on one of my Mauser target rifles when I jack the bolt back hard.

foothillsman · #16 02-04-2010, 07:36 PM

I have had soot like that on my cases when I used really mild loads.

What I think is happening is, as the powder ignites and the pressures rise, the brass expands to the chamber. The gasses are kept in by the brass till the bullet exits. Well in this case, the pressure is a bit low for the brass to seal neck completely to the chamber before the bullet is clear of the brass. Gasses then work their way back between the brass and the chamber's neck segment.

This really shows up when the manufacturer has the neck portion reamed out excessively or they are using a brand new reamer. Because it is a production rifle, the manufacturer uses reamers that are within certain tollerences to keep the price of manufacturing down, as the reamer is repeatedly sharpened, the tollerence becomes tighter until they reach the minimum tolerence for production rifles, the reamer is then discarded and a new reamer is used.

I don't think you have anything serious or dangerous going on.

Large chambers are known for less than stellar accuracy. One way to get the most out of the gun is to neck size only if you reload. And load it out as close to the rifling as possible, however each rifle has it's own preferences. Neck sizing usually is only a benefit if the chamber is perfectly in line with the bore of the barrel, which is not the case with most production rifles.

The second thing about large chambers are the life expectancy of brass shortens considerably. The Lee collet dies would be the best bet because it works the brass the least.

southernman · #17 02-05-2010, 07:25 AM

Thanks guys, I have contacted dealer, rifle is going back for inspection,
Did a inspection, baised on info you guys provided, cant see any evidence of cartaige hitting reciever, but may have been, as wasn't cranking the bolt back.
regardless, This rifle has had more failings to eject that all other sako rifles I have had put togther, and I wore out two.
can see a nick/scratch/mark in far end of chamber.
Will let them take a look and see what happens,
Thanks for your help.

southernman · #18 03-12-2010, 08:22 PM

Thought I Might update, Haven't herd anything back about rifle, But Clay at Prophet River has supplied a new rifle as replacement. Am heading off to New Zealand in 10days for the roar, and he Didn't want to leave me short.
Clay at Prophet River has earn't my respect. Sako not so much.

Tundra Monkey · #19 03-12-2010, 08:28 PM

Quote:

Originally Posted by southernman

Clay at Prophet River has earn't my respect. Sako not so much.

Well that's a -1 for Sako in the Weatherby/Sako thread

Have fun in the land of Kiwi's

tm

whitetail Junkie · #20 03-12-2010, 08:38 PM

Quote:

Originally Posted by southernman

Thought I Might update, Haven't herd anything back about rifle, But Clay at Prophet River has supplied a new rifle as replacement. Am heading off to New Zealand in 10days for the roar, and he Didn't want to leave me short.
Clay at Prophet River has earn't my respect. Sako not so much.

Thats Service you cant find anywhere else!!!!