I consider 100yard groups just a starting point and a measure of SDs and velocities.
Group size will normally increase as distance increases. Example : A 1" group at 100 yards
will almost all ways be 10"+ at 1000 yards and shooter ability is magnified at longer distance.
For Long range hunting the size of the game and distance to be hunted has a lot to do with
the needed group size.
Most set there max group size @ 1/2 MOA at any distance under perfect conditions and shooting
Obviously you want it to be better if possible and custom rifles
are capable of 1/4 MOA if tuned
and loaded correctly.
I have to rely on a great shooting rifle for long shots because it gives me confidence and I try
not to shame myself because I know that if I do my part it will do it's.
One good group does not make a long rang rifle But a consistent one does.
So the best group you can shoot consistently is what you have to live with and will limit the
distance you should shoot.
I normally use 300 yards as a good judge of whether I can use it for long range load
development .If it does well then I increase the distance to it's limits and decide if
this is the load to use for the type of hunting I will be using the rifle for.
I hope this will help.
J E CUSTOM