Assuming your statements of being 5 ft down and 30ft down are correct, something is majorly wrong not having anything to do with the 20MOA mount. I'm with the "redneck boresight" crew.
Try removing the bolt and looking down the bore at a target dot even 10 yds away with the rifle sandbagged. Then...adjust the scope crosshairs to be on or maybe 1" above the dot. You can do this in your home. At the range, you will be on paper at 25. Adjust then go to 50, adjust then go to 100.
With this large a problem, missing 5-30ft low @ 100...you either a) shouldn't be able to get the crosshairs on the dot your looking at through the bore at all, or b) if you are able to, then due to a broken scope, it will get out of wonk when you fire a live round and confirm the scope is messed up because you know the crosshairs were in line with the bore at some point before the recoil of the live round.
Or, if you have any other scope, mount that and see what happens?
Try removing the bolt and looking down the bore at a target dot even 10 yds away with the rifle sandbagged. Then...adjust the scope crosshairs to be on or maybe 1" above the dot. You can do this in your home. At the range, you will be on paper at 25. Adjust then go to 50, adjust then go to 100.
With this large a problem, missing 5-30ft low @ 100...you either a) shouldn't be able to get the crosshairs on the dot your looking at through the bore at all, or b) if you are able to, then due to a broken scope, it will get out of wonk when you fire a live round and confirm the scope is messed up because you know the crosshairs were in line with the bore at some point before the recoil of the live round.
Or, if you have any other scope, mount that and see what happens?
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