I’ve owned a number of 260 chambered rifles , a pair of 260 chambered hand rifles and even a pair of AR-10’s chambered for the 260 . It’s safe to say I truely like the cartridge and of course I handload everything I shoot . Just about any deer relatable bullet from 100-130 grains I’ve killed deer with in the 260 , well with the exception of the Berger 130 VLD Hunting Match bullet and I may try it sometime just for the heck of it . The cartridge would be fine with 140 grainers I’ve just never bothered to use them other than on paper . Funny because I’ve used 140’s in the 6.5x55 and 6.5x54MS with excellent results .