well multi ammo is great but do not think I will bother with the Arrow module for my Hydra... 220 fps with 370g bolts is about at a minimum 40 fps to slow for my taste...Heck, back in the old days I felt my 70 lb Browning Summit II was a bit to slow and even with an overdraw was only about a 35 yard deer bow... was using heavy 2219s tho... so yeah what is the minimum acceptable as you guys see it..?