Load data charts

[Bluto65]

These charts dont seem very helpful.
They all use 24 inch barrels and maximum of 175 gr bullets.
I would like to know 30 inch barrel and 180 gr bullets data for 7mm RSAUM.

 

[watercam]

Add 20-25 fps per inch to the 24" barrel data. Should be reasonably close. Once one gets beyond 30" I believe the velocity increase per inch is less depending upon caliber and powder though.

 

[Joe R]

Bluto65 said:
These charts dont seem very helpful.
They all use 24 inch barrels and maximum of 175 gr bullets.
I would like to know 30 inch barrel and 180 gr bullets data for 7mm RSAUM.

That is exactly why so many chronographs are sold. The charts give you a baseline, there are so many variables of that the only way you're going to find out what your hand loads are doing with your rifle is my measuring it yourself.

 

[sbhooper]

Even if you have the same length barrel etc., you will get different data. The charts are round-house and only a general guide. I have a gun with a fast barrel and get substantially different data than the 24-inch stuff even adding a few fps.

 

[amlevin]

Even if you have the same length barrel etc., you will get different data. The charts are round-house and only a general guide. I have a gun with a fast barrel and get substantially different data than the 24-inch stuff even adding a few fps.

Amen on the "fast barrel". Same here. I see speeds more appropriate for the upper end of the "load charts" from some "starting loads".

A chronograph is the only way to go if you want accurate speed numbers.