My 505 Gibbs weighs around 9 1/2 and recoil with 525 and 535 gr bullets @ 2150 is less than the 458 Lott and not much worse than a 458 Win. I also carried a 9 1/2 pound 500 Jeffery with 535gr bullets @ 2300 fps and would classify it in the same league as the Lott. Neither poses a problem but, as 450 No2 says, recovery time is noticable. so is their effectiveness.