What do you think that will do? They measured the same, and same brand of brass.



Re-reading this in the daylight. Two groups, two different amoutns of powder. Hit 2 different spots. So? You would think it would just be elevation, in perfect linear world.

Ya I would expect a linear spread. Maybe pressure spike causing something different. Primers look good on both? High chargers racks out fine?

I have notcied groups tighten up at with certain charges in some rifles. My 45-70 actually changes elevatio with charge at 50. My 30-06 and 243 do not at 100 yards. They tend to change accuracy. 45-70 is more accurate then people realize. Doesn't seem to care how many grains, udner max of coarse.




Keep a log book, and document how your charges work for you. Find the best grouping. With a chrono people also look for consistent speed if shooting long ranges. Then sight your rifle in for the load you decided on. Just my opinion. But I am only on 2nd cup of coffee, in vacation.