Hi Miles, either of these speedloaders will work with the Taurus 856 -
budsgunshop.com/product_info.php/products_id/82001/hks+speedloader+for+38+357+caliber+s%26w+k+frame+dan+wesson+ch ,
budsgunshop.com/product_info.php/products_id/82018/hks+speedloader+for+colt+detective+special+%26+diamondback+rev ,
Stay safe & have a great day!

Hi and welcome Miles. The best and fastest speed loader for the Taurus 856UL 38 is the (Buds has it listed as 5rd but it is the 6rd speed loader): budsgunshop.com/product_info.php/products_id/714004799/sl+j-k2c+comp+ii+spd+ldr+s%26w+k-frm ---- This video shows it superior operation compared to the twist type speed loaders - youtube.com/watch?v=Tc4-5fRuBNE

Miles, I like hks speed loaders. Speed loaders for the colt Detective Special
And cobra work with the Taurus 856. If interested here's a link to one I'd recommend that'll work great with your Taurus 856ul ................... budsgunshop.com/product_info.php/products_id/82018/hks+speedloader+for+colt+detective+special+%26+diamondback+rev .................. Hope this helps.