[pct-l] Base weight criteria, AND...

[Paint Your Wagon]

What’s the general consensus (items to be included) for defining one’s base weight, 
AND... 
what is a reasonable target weight for a US Mexico to US Canada border hike,
with somewhat lightweight gear expectations? 

In the past two attempts, I carried anywhere from 40 lbs. to 80 lbs.

Thanks,
Paint.

PS: 
FWIW: 
Regarding the big three:

In 2012, I used:

PACK- Kelty 110 liter Red Cloud backpack, weighing 5 lbs. 13 ozs. 
then switched to a Go Lite Odyssey 72 liter backpack, weighing 3 lbs. 10 ozs.

BAG- Lafuma down 30 degree sleeping bag, weighing 1 lb 13 ozs.
then switched to a Kelty Cosmic down 20 degree sleeping bag, weighing 2 lbs. 11 ozs.

TENT- Scheel’s Kelty Classic 2 two person tent, weighing 4 lbs. 7 ozs.

TOTAL weight: 12 lbs. 15 ozs.

In 2013, I used:

PACK- Go Lite Odyssey 72 liter backpack, weighing 3 lbs. 10 ozs.
then switched to a Mountainsmith Apex 80 liter backpack, weighing 4 lbs. 13 ozs.
then switched to a Kelty Red Cloud 90 liter backpack, weighing 5 lbs. 9 ozs.

BAG- Mountain Hardware Pinole synthetic 20 degree sleeping bag, weighing 3 lbs. 10 ozs.

TENT- Scheel’s Kelty Classic 2 two person tent, weighing 4 lbs. 7 ozs.

TOTAL weight: 13 lbs. 10 ozs.

In 2014: proposed:

PACK: Granite Gear Crown VC 60 liter backpack, weighing 2 lbs. 2 ozs.

BAG: Big Agnes Mystic SL down 15 degree sleeping bag, weighing 2lbs. 4 ozs. 

TENT: Big Agnes Fly Creek UL 2 two person tent, weighing 2 lbs. 2 ozs.

TOTAL weight: 6 lbs. 8 ozs.