I've only put 53 or 54 rounds down range through this rifle, but so far the 150gr and 180gr standard fare flat based ammo has shot smaller groups than the 165gr and 147 gr boat tails have.

It's a wood stock 30-06 with a 1:10 twist.

I know I need further testing to reach a conclusion, but any thoughts?

Anyone else seen this?

Thanks for all replies!