Bought a used Ruger 77 Tang safety feather weight rifle about 2 years ago in a caliber I didn't particulary care for. Had a varmit type barrel in 7mm mauser installed about 2 months ago and fought the heavy factory trigger which has kept the rifle from being the very accurate shooter I think it can be. Played around with trigger, polished the trigger sear for example, which helped....but weight of pull still about 4 lbs at best. Like others, goggled looking for adjusting Ruger trigger, found lots of posts claiming how easy it was to adjust Ruger trigger, but no one explained how to do it.
Recently discovered Rifle Basix, Inc., made a replacement trigger sear for the 77 tang safety Ruger trigger assembly they advertised capable of making factory Ruger trigger adjustable from 14 oz to 2 lbs. Early last week ordered one from Midway and with shipping, cost me under $40. Considering a Timney replacement trigger assembly is over $100, thought it was worth a try. (Just checked Midway, I must have bought last one, Basix sear now on backorder.) Installed the new sear, Basix's instructions are clear and you don't need to remove the Ruger trigger assembly to replace sear. Trigger pull, while better, still easily 3 Lbs plus Egads!!!!! Decided to polish area of the new sear that makes contact with bolt assembly sear? and played around with adjustments discribed by Rifle Basix. Probably now have trigger pull down to around 1 Lb. Can't wait to take rifle to range and prove the rifle can shoot the really tight groups I suspect it can do.
Basix instructions show three adjustment screws on Ruger factory trigger:
1. Overtravel adjustment screw : a set screw on bottom front of trigger assembly
2. sear adjustment screw: slotted screw head on bottom rear of trigger assembly that affects how much of trigger sear makes contact
3. weight of pull adjustment screw: set screw on trigger itself, you can see inside trigger guard. This set screw engages the weight of pull spring.
It is the Sear adjustment slotted screw and the weight of pull adjustment set screw that affects the weight of pull
Turn the sear adjustment slotted screw clockwise to reduce sear engagement, counter clockwise to increase sear engagement......so reducing sear engagement lessens weight of trigger pull needed to disengage the sear.
Turn weight of pull set screw counter-clockwise to reduce weight of pull (of the spring) , clockwise to increase it.
After I had installed my new trigger sear, I discovered my sear adjustment (engagement)screw was already adjusted as far clockwise as it would go and playing with the weight of pull adjustment set screw didn't seem to have much affect on the trigger pull. New sear felt gritty when pulling trigger. This is why I polished the new sear in its area Basix showed to apply a light grease. This made a big difference in my trigger pull with the new Basix sear.
Here is Midway info/pic of the Basix replacement sear. Now I wonder if I could have altered my factory sear to shape of the Basix sear.
http://www.midwayusa.com/browse/BrowseProducts.aspx?pageNum=1&tabId=8&categoryId=11650&categoryString=649***20766***9142***&brandId=1700
