ILF limbs seem heavier than marked

[kbetts]

I have a set of TT longbow limbs that are 60# on a 19" riser.  My riser is a 17" Morrison and when I bolt the limbs down, it is no doubt way over 62#.  I backed out two turns and now its manageable, but still heavy.  Is this common?

[riverrat 2]

Yes. Every inch shorter you go from the limbs rated riser length you gain roughly 1 pound. So you have went 2 inches shorter,gaining roughly 2 more pounds than what is rated. I have found TT limbs to be more like a 4 pound gain myself. Hope this helps,rat'

[riverrat 2]

Also,if your draw length is more than 28" those limbs will start feeling very heavy at the end of your draw cycle. rat'

[ron w]

Some Morrisons are marked in the limb pocket +8 ,+9 you have to add that to poundage....if it's marked like that! You could be shooting a lot more than you think. Plus I think TT limbs are marked at the bottom of their range. Your limbs would be maxed out at 64-65 + 2 for the 17" riser! You could be at 67-68#'s!

[BWD]

Your TT limbs are 60#s on a 19" riser, at minimum preload...let all the way out. Add 2 lbs. when going to a 17" riser, and you are at 62#s, at min. pre load. Screw them down and you will add about a pound for each turn. So, your set up should be somewhere in the range of 62-67#s,+ -, crunching the numbers, providing similar degrees of angle between a Morrison and TT riser.

I'll bet when you screw them limbs all the way down, your bow looks fairly fast, for 62#s.  :D

[kbetts]

Thanks guys.  Should have added it is a Gen II aluminium.  I can't find a scale but closer to 70# is what I guessed.

[kat]

ron w makes a good point about the +8, or +9 marked in the limb pocket. I own one, and 40# TT limbs go out to 53#'s. I have tried several limbs with the same results.

[wingnut]

Gen II risers are the same as ours so if rated on a 19" they gain 3-4 pounds.  The TT is rated on a 17" riser but is rated at minimum load.  So add 3 pounds for mid range and 4 pounds for the riser and you are a smoking 67 pounds.  Did I mention that TT limbs tend to run heavy also. . . LOL

Mike