Actually, I do comprehend his post.....
He has a Bear 76er with 45# limbs. (assuming they are actually 45#)
He's drawing 31" which at roughly 2 1/2 pounds per inch, puts him at about 52-53#
He's shooting a 480gr arrow, giving him about 9grs per pound. (10grs is about average, but 9 is OK)
He states that he's concerned shooting anything larger than deer, as he's "only" getting 172fps and a heavier arrow would be less.
He tried a FF string with padded loops, and screwed a limb tip. He tried a B-50 string and lost about 4fps.
Bottom line, his concern is speed....
How am I doing...??
Now, If he got a 55# set of limbs, at his 31" draw length he would be drawing about 62-63#
Shooting an appropriate weight arrow (580grs) He would still be getting about 175fps.
Many folks here shoot heavy bows. A heavy bow does not necessarily mean a fast bow.
(a 75# selfbow?? a 90# Hill longbow?? a 65# 1960's Bear Kodiak??)
I have shot 50-55# bows since I started hunting back in 1976. I ordered my Kodiak T/D with 52# limbs.
Just due to the fact that I'm getting old, and some minor shoulder issues, I ordered a set of 42# limbs for my T/D.
I have no issues what so ever with what weight folks shoot!! Shoot what's comfortable for you...
In the end, It's all about your ability to put the arrow in the kill zone. "Speed" is just a number.