Saco extractor

[LynnJr]

Drill two 3/16" holes in the bolt, (see figure 1) which exit into the magazine in firing position. In no way is the performance of your rifle impaired, but safety is greatly enhanced. If done with care, the gas vents appear to be factory installed.
After this modification is performed, escaping combustion gases from ruptured primers are vented harmlessly into the magazine. This minor change can certainly make a shoot more enjoyable and safer.



MACHINING SEQUENCE
1. Mount bolt, with firing pin assembly removed, in drill press vice. NOTE: A press should be used to attain quality results.
2. Scribe locations of holes to be drilled in bolt.
3. Center punch the scribed locations.
4. Use a center drill with a 3/16" point. Drill through and countersink just enough to create a slight chamfer. NOTE: Use lubricant. If you do not have a center drill, use a regular 3/16" bit and follow with a file or similar tool to break sharp edges away.
5. Use a 3/8" diameter round file to remove any burrs on the inside of the bolt.
6. Wash bolt thoroughly in solvent and blow dry with air.
7. Reassemble and relubricate the bolt.

It won't fix those who insist upon shooting a 308 in a 270 but it helps.

[LynnJr]

Diver
Back in the old days when guys were really pushing the Remington's hard they would drill two holes in the bolt to vent gases into the magazine well.
If you had a Remington 600 which is basically a xp-100 action with the severely doglegged bolt handle the older magazines would include a template for drilling the holes.
My father used to tell me your asking a lot out of that little vent hole when he would see me vibrating powder to get more of it into a case.

[diver160651]

Remington has a sealed breech with a gas path away from the shooter that will handle the gas if you blow a case/primer.
When you switch away from the standard Remington "3 rings of steel" design by cutting the bolt nose wide open to use a Sako, Mini16 or M16 extractor, you defeat the gas seal system and more of the gas can come out the back of the reciever.

Having personally blown a case on a stock Remington bolt/receiver and not even noticed the gas to the face, I much prefer the "3 rings of steel" design and therefore the Remington extractor that is required for it to work over the mini16, M16 or Sako extractor designs that leave the breech much more open during a blow-up.
I run Surgeon actions which make full use of the Remington breech system.

All actions have some sort of system to vent the gas that makes it into the bolt (via a blown primer) away from the shooter's face.
The difference is in how they handle the gas that makes it out of the back of the case during more dramatic failure.

Howa's and Weatherbys also have an open breech system.

Yes, I understand the Remington port ect. But I wish I had taken the image when my face was honestly coated in blood ~ It was slowly oozing out from everywhere below my glasses. Both times was on a 100% stock Remington 700 bolt. The gasses leaked back through the bolt shroud. It was violent enough to bend the stock extractor.

Just food for thought

> On my Deviants with the extractors as mentioned, I have had lots of case-head separations; with no gasses in the face.

[MongooseV8]

I also prefer the closed 700 bolt face. Ive blown a few cases and like it when the hot pressurey stuff goes away from my pretty face.

[ar15barrels]

Ouch. The nice thing about Howa/Weatherby Vanguard are those gas ports in the bolt, just in case. Is that sort of mod often done on Remingtons?

Remington has a sealed breech with a gas path away from the shooter that will handle the gas if you blow a case/primer.
When you switch away from the standard Remington "3 rings of steel" design by cutting the bolt nose wide open to use a Sako, Mini16 or M16 extractor, you defeat the gas seal system and more of the gas can come out the back of the reciever.

Having personally blown a case on a stock Remington bolt/receiver and not even noticed the gas to the face, I much prefer the "3 rings of steel" design and therefore the Remington extractor that is required for it to work over the mini16, M16 or Sako extractor designs that leave the breech much more open during a blow-up.
I run Surgeon actions which make full use of the Remington breech system.

All actions have some sort of system to vent the gas that makes it into the bolt (via a blown primer) away from the shooter's face.
The difference is in how they handle the gas that makes it out of the back of the case during more dramatic failure.

Howa's and Weatherbys also have an open breech system.

[LynnJr]

KenDog
Yeah the only difference I see is the pivot point.
I was going to take some photos but got lazy.
I am actually waiting on Dave to send me 2 M16 extractors because they sent me the minis by mistake. I haven't broken any but two of our shooters did and I wanted some spares just in case.
The BAT actions use a sliding extractor on the lug and the McMillan actions don't use a ejector just an extractor. The McMillan is very close to a Sako but the location is even further from the lug.
The pictures show 3 BAT bolts with the sliding extractors and notice one has no ejector for hotter loads.
The other picture shows the McMillan Sako style extractor on a 50 BMG and a pair of Stiller Tac408 actions. Notice one of the Stiller's has the full size M16 and the other is the Mini M16.
And no I am not a photographer and yes that's the best I can do while holding the handles up with one hand and trying to get the phone to take the picture while eating a snicker bar.

[kendog4570]

...The mini 16 is a Sako extractor just wider and longer. The M16 is a mini 16 just wider and longer.

The main difference is the method of retention. The Sako is toggled in place and the M/Mini 16 is cross-pinned. SUPPOSEDLY a higher threshold of force is needed to blow it. At least that's what Dave Kiff told me during one of his quadruple espresso/Red Bull/Rock Star driven diatribes.

[sigstroker]

Case rupture in a magnum. I had lots of case head ruptures but they still seal and gasses go down the barrel. This was a complete vertical rupture of a smaller dia case that headspaced like the magnum, but could not seal. It was violent enough that at first I thought the bolt hit me..


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Ouch. The nice thing about Howa/Weatherby Vanguard are those gas ports in the bolt, just in case. Is that sort of mod often done on Remingtons?

[LynnJr]

The Sako extractors are usually installed to solve an extraction issue not to create one.
The extractors location varies by manufacturer with some entirely on the lug and some well clear of it.
The mini 16 is a Sako extractor just wider and longer. The M16 is a mini 16 just wider and longer.
If you shoot a 50BMG with a 800 grain bullet and 258 grains of powder they have an extractor that is exactly like the Sako only way wide of the lug.
The Mauser actions and the Enfield's have them 180 degrees apart and on both lugs when pulling a case.
If your chambering requires a specialty extractor get it and don't worry about it as thousands of shooters do it daily.
If your just adding it without any other reason buy some lotto tickets as the schools can spend the money and you might even get lucky.

[diver160651]

Saco extractor

Blown primer?

Case rupture in a magnum. I had lots of case head ruptures but they still seal and gasses go down the barrel. This was a complete vertical rupture of a smaller dia case that headspaced like the magnum, but could not seal. It was violent enough that at first I thought the bolt hit me..


Sent from my iPhone using Tapatalk Pro

[sigstroker]

Blown primer?

[diver160651]

Saco extractor

I don't recommend converting a factory remington bolt to a sako extractor.
When you change the location of the extractor from the middle of the left lug to ABOVE the left lug without also rotating the ejector plunger in the boltface, you are dramatically changing the ejection angle.



The ejection angle is a product of the extractor location combined with the ejector plunger location.
The 700 action was designed with the extractor in the middle of the left lug and then the ejector plunger is located to get the fired case to fly out of the ejection port.
Changing the location of the extractor is changing the design of the action.



I have seen lots of problems where the fired cases will bounce off the scope knob and end up backwards in the action.

If you want to change to a different type of extractor, the right solution is to get a whole new bolt with the extractor cut already made and the ejector rotated appropriately in the boltface.
PTG makes them to order.
Figure on having the headspace and maybe the endspace corrected on your barrel as well if you are NOT also rebarrelling when you get the new bolt.

[sigstroker]

Sounds like kendog knows what's what.

[Jarhead]

That settles this idea

[kendog4570]

If the Rem/Sako fails you will get it right in the chops. Sako bolts have a baffle to prevent this, 700's do not. The Mini 16 is a safer option. I can supply one that does not require the barrel counter bore to be opened up to a nominal .785".