Hello, I guess I'll start by giving some background before I ask questions. My name is Chad and I live in northern Saskatchewan. I have been reloading for some years now and drive my hunting rifles to what some say is just picky accuracy, and after trying a little silhouette shooting found my passion lies with the bench. I spend allot of time on gunnutz and have struck out in the first step of benchrest shooting. I purchased a used stock, I believe it is either a Lee six or Kelbley club which I believe are the same company now. I bedded a new Remington action in it with a Lilja LV barrel. The barrel had around 100 rounds down it when I purchased, I believe it was intended to be a 6ppc barrel but is chambered as 6br with a slow twist. It has a polished factory trigger at just over 1lb. (This is soon to be replaced with a Jewel.) For optics it wears a Bausch and Lomb 4000 6-24 with standard weaver bases and rings. I have tried Berger and V-max bullets. I found my best groups with 75gr v-max and 8208xbr. I can consistently achieve .3-.4 inch 5 shot groups at 100 meters but want .1-.2 inch groups. Oh I have Lapua brass and it is chambered for Lapua no turn neck. I also have a Redding bushing 3 die set. And I shoot from sand bags. Our range is a 200 meter range in the bush and I am almost always the only one there, so cease fire only comes when a bear is wandering buy!

So here comes the questions. Obviously I don't have a Bat, Stoll or Panda action but would like to squeeze this gun for all its worth while I learn to shoot BR. I would like to know that the gun is more accurate than I am, and if not then what to upgrade.
1. Big question is how to improve? First I assume is to change the trigger, then...scope? Barrel(6ppc)? Action? Front rest?
2. What's with the square on the target above the bull?
3. Where can I get the heat deflector plastic thing for my barrel and is it legal for BR?

Ultimately my goal is to perhaps someday shoot with you guys and gals and try out for team level events.

Thanks in advance.

Chad