My R#1A in 7x57 consistently shoots three 150s at 1/2" to 3/4" at 100 yds.

I -relieved the wood at the rear of the fore arm to not touch the action.
-Put some bedding in the front of the fore arm.
-Put a hard plastic shim snug between the barrel and the hanger.

Holds poi without shift over time and weather variations.

Did same with R#3 in 223 and same results.

jmho
Tim

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At Khe Sanh a sign read "For those who fight for it, life has a flavor the protected never knew".