Help! I've lost 500fps!

[Mr Fudd]

1" higher would make sense with a lower velocity load if he was measuring the maximum ordinate.

In other words if he zeroed at 200 yards he would then expect something like 1" high at 100 yards. If he found that it was in fact 2" high at 100 yards on shooting the lower velocity is indicated.

weird one, losing 500fps seems almost impossible without maybe having used a much slower powder in the second set of loads.

Soot on the cases?

Flashheart you are exactly right, first batch chrono avg 3550fps zeroed at 200 yards, 1" high peak at 130 yards, yet with the new batch chrono avg 3060fps! and its 2" high at 125 yards!!??

Going to clean the barrel and then I'm starting my powder loads again as something is definitely a miss!

[Randy Bohannon]

Flashheart you are exactly right, first batch chrono avg 3550fps zeroed at 200 yards, 1" high peak at 130 yards, yet with the new batch chrono avg 3060fps! and its 2" high at 125 yards!!??

Going to clean the barrel and then I'm starting my powder loads again as something is definitely a miss!

Check you used the same powder from both mate, if it wasn't for the difference in the trajectory I would have said it was the chrono.