Just for the heck of it, I'd try 175 gr. and 130 gr.

To give you a real life example, I have a good hunting buddy that had issues with a Browning A-Bolt in 30.06 Spr. He tried sighting in a new scope using Core-Lokt (150 gr.). The groups were horrific. I am talking 4 MOA at best. I suggested he try a differnt load. He went overboard to say the least! Next week he showed up at the range with 11 boxes ... all different loads ... Remington, Nosler, Hornady, Federal, Winchester ... covering from 150 gr. to 200 gr.

Of these we found 4 that grouped very good and one of these 4 that grouped under 1 MOA consistently. Happened to be a Federal Premium using a 180 gr. Partition bullet.