This is an apples to oranges comparison with only one point to be made-----if barrel temperature is even a consideration with .22 Long Rifle.

I have a Colt "Sporter" (AR-15, 223), with a Trijicon ACOG, fired from a BR Pivot (That which Caldwell either bought the patents for, or just plain copied---excepting the tolerances for the center pivot---Caldwell's is looser/easier to assemble/disassemble, with no noticeable effect except for shots beyond 300 yards.

To the point: This outfit makes for 3/8" groups at 100 yards---from a cold barrel---kept cold by f i r i n g----s l o w l y!! Increasing the rate of firing opens up the groups to soup can size----right now!

Ralph Tremaine