Thread: Frustrating arvo at the range. Powder charges.

Originally Posted by Rated M for Magnum

Just a suggestion, once you have your velocity node sorted, do you still need to use the chronograph?

After all the magnetospeed will cause headaches with group tests because as you have said, it will affect barrel harmonics. I haven't watched Eric's videos in a while so could be wrong.

Depends what you’re objective is. For a hunting set-up, it’s probably not necessary to continue with the chronograph during seating depth test. But it is worth knowing that your velocity may change with seating depth as internal volume changes and your ES/SD

I look for where several groups with low ES/SD coincide with small group size. It’s easy to get sucked in by a single spectacularly small group and ignore the so-so ES/SD, but this is unlikely to consistently hold-up at distance.

I run a tuner-brake on my match rifle. The weight is maybe 50-75grams and only 1/8th of a turn will take the load out of tune on a 26” Medium Palma contour barrel (barrel weighs 3kg). So the effect of the MS on your groups versus without, is very real.