RE: blr trigger how to fix
I am completely lost here.
What exactly are you refering to as the sear spring. The spring under the sear or the spring that is in front of the finger lever (trigger) and is there to provide trigger tension?
#1. The spring under neath the sear would have to be incredibly long in order to compress flat and bend the spring. The sear would make contact with the finger lever before the spring was able to be flattened completely. Was it bent when you took it out initially or did it get bent after you put it back in? If it gets put back in but does not sit in the hole properly this may be able to happen.
2. The burrs are not burrs but rather punch marks on the bottom of the receiver and are there to keep the pins from backing out of their holes. If you drive out the pins the wrong way it still shouldn't gouge the pin as the pin is hardened and is harder than the receiver or the trigger housing.
3. Bolt action rifles do not have hammers so I don't have a clue here.
To be perfectly honest here it sounds like you took apart the trigger and didn't put it back together correctly and some things got messed up in the process.
Do you really know how a Remington trigger works? Not trying to insult here but I do not get the feeling that you do from reading your post. Triggers are bad things to go fooling around with if you don't know what you are doing.