Spooling a LC reel
I'm having trouble getting my reels to measure correctly. Borrowed my neighbor's measuring wheels and marked off 100'. 1 reel reads 120 and the other 115. Any rules of thumb you guys/gals use for filling a reel up with line. I used 17lb mono for backing then my braid. Also, if I leave them as is, how would I determine how much to let out beyond that 100'? Like reading 120 for 100, would I just add 2' for every 10'? Example if I want to fish 150' do I let out 160' ? This being my 4th season, I'm catching fish but still got tons to learn. Thanks for the look.