for me, i recommend dun sing at all. just talk cock with fren and walk like normal. lean forward a bit so you balance your fieldpack behind and the stupid rifle in front.
very impt is the pack items put properly, heavier all the way at the btm.
suggest you go buy the fieldpack strap de padding. pasir ris de army shop got sell. cheap cheap and not bad actually. make sure the fieldpack is sticking to your back, not like you go orchard jalan jalan let loose loose.
and rmb to keep drink water, less water = less weight. people say refill water bottles dun monkey see monkey do go refill at jerry can. refill with your water bag, same theory applies here.
my experience on water usage is, i walk 24 click only drink 4 litres nia. water bag and bottle all empty when i finish. can be done one la.