Maybe this isn't relative but I have reached a 3 shot average of 3083fps with my 264wm with the 160gr Woodleigh PPSN with 71gr of the old H570 powder and the readings were 3052, 3088 and 3108. Have some to test with 73gr H570 which could reach 3150. 30" Shilen barrel.
Last edited by 264wm; 02/08/14. Reason: typo
