Gunsmithing Sako 85 Ring Base help

zog

Sergeant of the Hide
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Aug 21, 2019
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OK in the stupid question category - I am removing Leupold rings/bases from my Sako 85 Finnlight that I purchased as a package with scope installed, and I just realized I don't know how the bases are attached. Is this a press fit or something? How to remove and replace?

Thanks
Sako Bases.jpg
 
Thanks - that's what I thought. I just didn't want to go tapping/beating on them without somebody's approval of experience. I might start with hardwood tap then graduate to brass before steel.

Edit - I like your signature quote!
 
Yeah, I've had a few Tikkas and CZ rifles with dovetails like that. Shouldn't be too tough to move them. But you can put a drop or two of penetrating oil between the mounts to help get them moving if needed.
 
Got 'em off - thanks. (but not until I hammered the second one on tighter before seeing it was one-direction - no harm done though.)
 
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The taper is now obvious without the bases. Put 'em on going forward, off toward the rear. Obviously so the opposition to the recoil pushes the base tighter, not looser.

sako taper.jpg
 
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I would not drill/tap. Here's why.

From thier FAQ:

Frequently Asked Questions
Question 1) How do your SAKO 85 rails attach to the rifle?
Answer: Our SAKO 85 rails use a light press fit onto the dovetails and have a
positive recoil stop machined as part of the rail.
Question 2) There are no screws or clamp bolts. How can this be secure?
Answer: The SAKO dovetails use a 31:1 taper. This is a self holding taper by
any engineering standards. When a customer selects the matching rail for their
particular action length, we are aiming for a 1.5MM to 2mm of press fit. In other
words, when the rail is slid forward with firm hand pressure only, the base will
stop short of perfectly aligned by about 2MM. Using a wood dowel set against
the aft end of the rail It will take several light hammer taps to seat the base
properly as it advances the final 2MM to the recoil stop. If 20 Kg of hammer
impulse was needed, then you would have 640 Kg of clamping force or over
1000 lbs. Your base is very secure.
Question 3) How accurate can this be.?
Answer: We have several customers with 7MM rem Mag and .300 WM SAKO 85
rifles reporting 1/2MOA many years after installing their scope in Near MFG
Rings and Rail as described above.
 
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I am using the Optilock ring base combo on mine. I like it, but if I were to change it, I would definitely go with the Near rail. I wouldn't be drilling and tapping though.

Answer: We have several customers with 7MM rem Mag and .300 WM SAKO 85
rifles reporting 1/2MOA many years after installing their scope in Near MFG
Rings and Rail as described above.

Thanks. I take it back. Maybe I shouldn't be so against pressure fits. People who know a lot more than me designed them. I appreciate the drill/tap advice, but for me I'd rather not add holes that Sako didn't intend on.
 
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Thanks. I take it back. Maybe I shouldn't be against pressure fits. People who know a lot more than me designed them.
I was in the same frame of mind a handful of years ago. Then I was researching mounting options and came across Near Mfg. I called and spoke with him once to gain a little more understanding. He sold me on the concept.
 
Oh, I'd also like to say congratulations on getting that rifle, I love mine and I'm sure you will too. If you dont mind me asking, what is yours chambered in?

300 WSM. The more I shoot and deal with this 85 Finnlight, and the more I shop and try other rifles, the more I find to like love about it!. 3 years ago when I was living in Canada and did not bring my guns up with me, I needed a rifle for a moose hunt. I had heard good things about Sako but didn't know much about them. I bought this only because it happened to be the only rifle on the used rack in one of my two favorite calibers. I thought I was paying too much for a rifle but as it turns out it is about the best piece I have ever had my hands on.

Because I got it in Canada I was able to get the two stage set trigger, so it's set at 2 lbs and reduces to about 12 oz (I think) with the set. (I have since found that Sako only exports two stage triggered Finnlights to the US in smaller calibers). It also had a brake already installed. I had never shot with a brake and now I'm hooked; what a difference with 300. The drop mag works like a dream and is a must in Canada, where to stay legal you must empty the rifle every time you get in a vehicle.

And now that I've learned more about it, I even like the scope mounting setup. I's just not very versatile in terms of rings you can get for it.

The only thing I never liked is the corny rubber grips on the stock. I have since learned that it is a very well made stock; too bad they messed it up with those styling grips. I'm considering another stock but it's hard to justify spending the money only because I hate the styling. Sako is also more difficult to match with anything aftermarket than others.

It has put a fair amount of meat in the freezer and antlers on the wall.

Oops I got way off my own topic here - maybe I should have done this under the rifles category.
 
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