hardcastonly

Id agree that 5" hundred yard groups, shot off a good bench rest ,
with factory ammo and if you've tried several bullet weights and brands of ammo,
are un-except-able in a name brand bolt action,
the fact two different rifles show similar poor accuracy makes me think its not the rifle.
obviously a clean rifle bore and a decent scope and mount is required,
and Id suspect its the scope, or scope mounts, until proven otherwise.
while theres zero real info posted so far,here,
suggesting the shooter,or rifle is at fault, or that,
the scope or scope mounts being used,
the ammo or rifle itself is at fault,
and the cause of those 5" groups,
I've also rarely seen a new bolt action that would not consistently group in under 2"
at 100 yards, off a good sand bag, rest with a skilled shooter, and decent factory ammo.
but I have seen bad scope mounts,
scopes and plenty of people who lacked the skills too regularly, shoot tight consistent groups.
individually eliminate each potential source of that in-accuracy and you should find its source.
logically a process of elimination,of taking accurate notes,
of the potential cause and effect of changes made would be used, I.E.
clean the rifle bores carefully,
change the scope mounts, scope, and shooter, shooting the groups,
having a isolate and test approach helps,and watch the resulting groups.
as each change was done as a single change,notes taken and results logged,
each change being individually made,youll soon find the problems source