Bergara BMR Easy Trigger Mod

davidnelson2014 said:

How does your BMR Shoot???? I recently purchasex one and have just started testing ammo. What have you found shoots the best????

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Mine is on order. I am trying to get up with gr8guns to see if he has any 4-40 dog set screws left so I can work on my trigger pull.

Did this trigger the other day, had to purchase a new 4-40 tap when the one that came in my cheap set wore down and wasn't cutting it, literally, even though I used oil.

The new tap worked great, got a bit worried when most of the tap went into the trigger housing. I didn't know how far I needed to get the threads cut. Stopped when there was some extra resistance, probably the tap bottoming against the trigger mechanism. The 4-40 set screw then screwed in easily after cleaning up the hole with a tipless Q-tip.

I don't have a trigger pull gauge, but I adjusted the set screw based on visually looking at the sear engagement through the hole in the side. Didn't want to set it too close to the hairy edge.

Finding a blind 4-40 tap can be a challenge. I just ground the point down a bit on a standard $6 eBay tap to accomplish the same. The dog head screws are available there too. I got the trigger in my B14R down to 14 oz with this mod. Well worth the effort and cost.

My BMR steel factory trigger was at the lightest setting at 2.5 lbs. After the tap and screw mod mine is now at 1.5 lbs. with a crisp clean break. No need to go any lower as 1.5 lbs. is perfect for my type of shooting. Thank you all who contributed to this trigger mod thread.

I am going to work on mine after the new year. It is not bad right now from the factory.

plinker4life said:

Bergara BMR Trigger Mod same as B14R

Only factory trigger adjustment is for the spring tension. So I just backed it off to minimum "screw in front of trigger".

There was no factory sear adjustment, but there is a pilot hole pre drilled in the back of the trigger group that conveniently lines up with the trigger bar. Drill and tap this hole 4-40 and using a long grub screw. You now have fully adjustable sear engagement. I was able to get the trigger in the +- 1# range safely with out stoning or polishing.

Click to expand...

plinker4life said:

Bergara BMR Trigger Mod same as B14R

Only factory trigger adjustment is for the spring tension. So I just backed it off to minimum "screw in front of trigger".

There was no factory sear adjustment, but there is a pilot hole pre drilled in the back of the trigger group that conveniently lines up with the trigger bar. Drill and tap this hole 4-40 and using a long grub screw. You now have fully adjustable sear engagement. I was able to get the trigger in the +- 1# range safely with out stoning or polishing.

Click to expand...

I twisted the Tap as hard as I thought i could without breaking it ended up using a dermal too and grinding down the 3/4" set screw works great now 1 pound .

plinker4life said:

Bergara BMR Trigger Mod same as B14R

Only factory trigger adjustment is for the spring tension. So I just backed it off to minimum "screw in front of trigger".

There was no factory sear adjustment, but there is a pilot hole pre drilled in the back of the trigger group that conveniently lines up with the trigger bar. Drill and tap this hole 4-40 and using a long grub screw. You now have fully adjustable sear engagement. I was able to get the trigger in the +- 1# range safely with out stoning or polishing.

Click to expand...

I will have to give this a go. Thanks