Rimfire Central Firearm Forum banner
  • Whether you're a greenhorn or a seasoned veteran, your collection's next piece is at Bass Pro Shops. Shop Now.

    Advertisement

P75 Sako in 22 Hornet????

7.2K views 48 replies 8 participants last post by  TEDDY BEAR RAT  
#1 ·
I know this is a Rimfire board - but I need some help with a Sako, in .22 Hornet. It looks like a Finnfire - but is not a model 78. The gun is marked P75 (not at all anything like the current model 75 centerfire). Magazine fed bolt action. Could be from the 1970's? Maybe 1960's? The gun is like new - but I'm confused by the trigger. It seems like its either a 2 stage - with a long 1st stage, or its not adjusted correctly. I can not find any reference to it - let alone a schematic to verify the type, and adjustmetn procedures for the trigger. Does anyone have an idea?
Thanks
Mark
 
#2 ·
It sounds like it's not adjusted properly. Look at the trigger and if it has screws in it, then it's adjustable. You should be able to figure it out. Usually screws in the forward part of the trigger are for weight and overtravel, while a single screw in the rear is usually for engagement. If you look it over you should be able to see which is which.
 
#3 ·
I've never seen a P75, but have seen them mentioned from time to time. I can't tell you a thing about them.

The long pull makes me think it might have a single set trigger. Have you tried cocking the gun, pushing the trigger forward and then dry firing it? Instead of a 2 to 4 pound pull it should be IIRC 7 or 8 ounces in single set mode. Working the safety should return the cocked gun to the heavier trigger pull.

As far as adjusting I don't know. I seem to remember seeing the directions posted somewhere on the web (big help, huh?), but I need to leave soon for a cookout - shame we're going to have thunderstorms.

John
 
#4 ·
Thanks BChannell and John. I need to spend some time with ... there are adjust screws as part of the trigger assembly.... I'll see if it is a single set -- never even thought of that angle John...
If anyone rembers the post or website for the trigger adjustment - I'd be grateful.

Thanks
Mark
 
#7 ·
I can't find the site I remember seeing years ago, but these instructions are for the Finnfire and should get you started. They can be found at:

www.sako.fi/pdf/manuals/sako_finnfire.pdf (requires free Adobe Acrobat Reader)

Standard trigger instructions from page 12:

[screw #1 is in front of the trigger. I couldn't copy the diagrams. JBT]

- The trigger has no first pull and the trigger pressure is set at the factory to approx.
15 N.
- Both the sear engagement and safety are set at the factory and need no adjustment
of any kind.
- Should you wish to alter the trigger pressure, the stock must first be detached.
To do this, remove the trigger guard fastening screws.
TRIGGER ADJUSTMENT (Fig. 6)
- The trigger pull is adjustable from 10 N to 20 N [about 2 to 4 pounds. JBT] by means of the screw 1.
- Turning the screw clockwise will increase the pressure. Turning the screw
counterclockwise will reduce the pressure.
NOTE! FOR SAFETY REASONS DO NOT ATTEMPT TO REDUCE TRIGGER
PRESSURE BELOW 10 NEWTON (2 LBS).
The safety is permanently adjusted at the factory. However, if the trigger, trigger
sear or safety lever has to be changed, the safety must be readjusted. For this
operation the trigger mechanism must be returned to the factory in Finland

Single set trigger instructions from page 12:

[screw #1 is in Front of the trigger; #2 is behind the trigger]

SINGLE-SET TRIGGER MECHANISM
For use as a normal single-stage trigger, squeeze rearwards in the normal fashion.
The trigger can also be "SET" by pushing the trigger forward until it stops.
The rifle can now be fired with only a light touch. WARNING! WHEN THE TRIGGER
IS IN THE "SET" POSITION, THE RIFLE MUST BE HANDLED WITH
EXTREME CARE, AS ANY SHOCK OR VIBRATION CAN DISCHARGE THE
RIFLE. If the rifle is cocked, with SAFETY ON, the trigger CANNOT be put into
the "SET" position. To return trigger to the "UNSET" position, the safest method
is to put "SAFETY ON" or open the bolt. NOTE! When the safety is in the "ON"
position it locks the trigger mechanism and the bolt. The rifle can be cocked only
when the safety is in the "OFF" position.
TRIGGER ADJUSTMENT (Fig. 7)
The trigger mechanism is constructed for 10 - 20 N (2 - 4 lbs) trigger weight in
single-stage position. The trigger weight is adjusted to 13 - 15 N (3 lbs) at the
factory. To be sure that the single-set trigger operates correctly in all circumstances,
the trigger weight should not be increased. The trigger weight can be
adjusted by the means of screw (1). Turning the screw clockwise will increase
the trigger weight. NOTE! Screw (1) is self-locking and needs proper tool.
SET-TRIGGER ADJUSTMENT (Fig. 7)
When the trigger is in the "SET" position, the trigger weight is 2 - 2.5 N (7 - 9 oz.)
and cannot be adjusted. The screw (2) adjusts the gap between the trigger and
the plunger of the trigger weight spring. This gap affects the creep in unset stage
and should be as small as possible, preferably the screw should lightly touch the
plunger. On the other hand if the pressure between the screw (2) and the plunger
is too heavy, it may prevent the set-trigger from working. NOTE! Screw (2) is
self-locking and unnecessary adjustments should be avoided to keep the selflocking
in good condition.
SAFETY ADJUSTMENT
The safety is permanently adjusted at the factory. However, if the trigger, trigger
sear or safety lever has to be changed, the safety must be readjusted. For this
operation the trigger mechanism must be returned to the factory in Finland.
 
#9 ·
Sako p75 needs a screw

Long story short, after your help and spending time examining this trigger, there is a screw missing. It's the screw that threads into the top barrel end of the trigger that sets the amount of take up in the trigger. Missing the screw means it has a super long take up, making it a miserable two stage trigger. With a screw in the threads, it should be able to be made a decent single stage trigger. Now, the search begins to locate this tiny metric screw. Any suggestions? Thank you
 
#15 ·
Thank you

Thanks Griffith

I tried that and only found my own requests for help. I still can not confirm or deny if this rifle is supposed to have a two stage trigger, or a single stage trigger. This is a beautiful rifle, and mine is about as new as I've seen any rifle without a box and papers. My gunsmith has been working on rifles for about 50 years, and is struggling understanding it. I'm still hopeful that someone who owns one can tell me what this trigger is supposed to be... and how (if mine is not correct) can be corrected... thank you again
 
#18 ·
Griffith. I found your thread, thank you. I think we have the same rifle. Can you help me with the trigger? Is it supposed to be a long two stage trigger, at the 4-5 lb level? Does your have a screw in the threaded hole at the top front of the trigger? I can use any help or advice you can provide. It's an otherwise fine rifle, but the trigger as it is, is not useful hunting or at the range. Mine is worse than any military Mauser two stage I've shot before. Thank you again for your patience and help.
 
#22 ·
Thank you

Thank you Griffith. I really appreciate the help. My rifle is at the gunsmiths. He was baffled by it, and wanted to think about it for a while. I'll go see him and tell him, your trigger has the screw, mine should too. I hope someone will make a magazine for these rifles. Thank you again.
 
#23 ·
Resurrecting an old thread I started a long time ago. I didn’t create a new thread because of all the covered ground and photos in this thread. BLUF: I had a gunsmith locate and install the missing screw, but it did nothing to improve this trigger. I don't use this rifle at all, because the trigger is very poor. Super long travel, then a heavy to me second stage to fire. Having fired other Sako rifles, I’m more than disappointed. There seems to be several versions of triggers installed on these P75 rifles. Anyone else have any ideas for me? Thank you
 
#26 ·
I know the rifle is marked 75, but I would almost bet it's the same as an M78. Sako didn't just throw away the old and make up brand new designs back then. The downgraded trigger makes me think the 75 is just a cheaper M78, so that trigger should work. Installation should be a breeze, and you can always return it if it doesn't fit.