Thread: Frustrating arvo at the range. Powder charges.

Originally Posted by Snowgrass

My initial concern is why there was a difference in average velocities between the 24gr loads today and the ones from a few weeks ago, all else being equal.

Essentially because 24gr is not a powder weight that gives a stable velocity node. Statistically, You could shoot it again tomorrow and get the original low SD’s, or it could be twice as bad. Doing the ladder test will help identify a stable velocity node.

Originally Posted by Snowgrass

The other bug bear is not knowing what accuracy effects having the magnetospeed hanging off the suppressor is having. Just means having to double up on loads I guess.

The magnetospeed will definitely have an impact on the harmonics and therefore accuracy. So yes, you’ll need to run the seating depth test twice, first without the MS shooting for groups, then again with the MS to record velocities and SD’s.....or borrow a Labradar (a ball ache in itself to use at times).