What I have been taking along has evolved.. I have tried chest rigs, and you just take more shit than you need.
Also the rifles tend to be a little on the heavy side too, mine in the range of 15-17lbs.
Now I am using a Biathlon sling to carry the rifle, and it has been one of the best investments yet. Makes carrying the big heavy rifle no problem.
Everything else goes in the belt/pocket system, and there is just enough room.
In there is
Swaro Laser Guide
Kestrel 4500NV
PDA with Exbal
Small UHF
Ammo holder
Water bottle.
I can also put another 500ml of water into the big pouch when the going hot.
Around my neck the binos, whicha re the Bushnell's. I have the harness for these but will go without it for starters. These will be used more than anything else so they shouldnt be a problem where they are.
The rifles both have ACI units and bubble level to stop the canting.
All packed its a lot of gear that can be easily carried.

Here is a couple of videos, taken with phone so quality a bit poor. You should get the drift though. This is the 300WSM shooting 200 grain Sierra Matchkings, range 780m to the tree shown on the edge of the paddock at the end of the videos. You can also see how efficient the muzzle brake is, very little recoil which allows easy spotting of shots. I was shooting at a small section of branch, and 4 shots were hits. Others only very near misses.


The rifle....

The biathlon sling....

I will have to invest in a half decent video camera now I think. It looks like a whole lot of fun using one!!! Dont pick on the shooting mat either!!!!!!

Cheers