Les they will go bang and you will be fine.Never used them for the FF load (use Fed 215),but the WLR primer is no wimp.
The FF load does not shoot quite as "tight"for me in my rifle,as full house Mashburn,and it's slower than what the cartridge will do with a 139/140 but it's fine.Could hunt with it pretty easily.The 139 with 65 IMR4350 does 3150-3190 in my rifle.
I have only shot the 139 Hornady but Beretz used the 140 AB for app. 3200 with his FF load.
