20MOA can someone tell me how to shim my scope?

Might have found the problem, back to original post.... Is this a Remington LA (LONG Action) in .308? Really? Someone might have built it on an old 30-06 or something - but 308s are SA (Short action) Remingtons....

Do you mean "Left hand"?

If it is a left hand action - odds are you don't have the correct Leup standard base for it. I've been trying to source such a creature for a buddy for almost a year. Nada. Leup doesn't make them now and I don't think they ever did. Keith C at Milcun uses Left-hand actions and he told me he always had to use two-piece bases before he switched over to ambidextrous rail mounts...(Milcun makes a base now - I own a couple and they're awesome. Rem700SA only. I had to use a Badger on my LA 6.5x284)

If you have a Leup standard base and you've screwed it down onto a "Left" handed action - good chance something doesn't fit right. You might need to get something else and start over. (Good opportunity to get the 20 MOA rail everybody's been pressuring you to get)

It is a long action (I know cause I assumed it was short and got the wrong base) and it is a right hand.
I am using very light loads eq: RCBS 165grain Sil with 10.3 grains of Unique.
 
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