Metal can 4759 vs plastic can 4759

[esshup]

I know, I know. Shoot it over a chronograph and stop wondering.

What's the difference in amount of powder you'd need when switching to the new stuff to keep roughly the same velocity as the old? I was shooting 43.5g to 44g of the metal can 4759.

Just a ballpark would do, I DO plan on shooting it over a chronograph. With the hot weather, I just wanted to minimize shooting time.

[dans]

I shot 43 grains from the metal can and 45 from the plastic jug.

[esshup]

Thanks.

[Dave1]

Just curious, does anyone have any load data/chrono readings for 43-45 grain loads of the plastic jug 4759 with 250 grain bullets?

Thanks, Dave