.300 Win Mag load issues

[Snakeriver]

 Zero it at 100.  2" inch group at 300 is barely above 1/2 moa which is what its shooting at 100.

[Snakeriver]

Zero'd at 100 you should be around 9 inches low at 300. Thats just a guess though as I dont have a 300 wm.

[MeepDog]

Do you have incredibly high scope rings? Maybe it's a case of catching it on the way up and then on the way down like a shotgun slug.

[cooltimber]

cheek weld ?

[Mtnwalker]

This is not a ring height issue unless your rings are 4 inches tall. My guess is:

Bad zero. Shoot a 7 shot group at 100 with no adjustments between shots. 3 shot groups aren’t sufficient when diagnosing issues

Loose component or scope failure.

Operator error.

 

[Fish4Fun]

Next time out I am going to have him shoot a factory load at the same distance as the hand loads.  Compare one to the other side by side. I am now thinking a scope that is out of whack. He has the Leupold 4x14 CDS on there.  After elk season, do more testing and then send back to Leupold for a tuneup

Thanks for all of your ideas, I have been scratching my head about this rifle.

[Taco280AI]

Whatever it is I'd find and fix it now if it's going to be used for hunting. If it's the scope, my guess, who says it won't mess up more?

[Fish4Fun]

Whatever it is I'd find and fix it now if it's going to be used for hunting. If it's the scope, my guess, who says it won't mess up more?

Not my rifle, if it was it would have been fixed long before now.

[chukar58]

Have you ever been able to shoot a good group with this load at 300 yards?  In theory the bullet should be dropping out at 300 yards,  my suspect is bad mount or perhaps scope or action screw is not torqued and loose.