Interesting. I remember watching a video from Erik that said the same thing, he doesn't give a sh*t about groups, he cares about consistency. Then looks at groups.For the money I am pleased with the Magnetospeed. No it does not affect chrono data. I use it for load development and/or calculating my drops for longer distances. Imagine only having a 100 yard range to practice yet in competition being able to drop your first 600 yard shot into the 10-ring or 9-ring at worst. It works great for that.
Yes, something hanging off the end of the barrel may affect accuracy. That doesn't matter to me because once I develop the load with the lowest SD and ES that usually translates into the best groups.
If I see a deal on a Labradar I might grab one but I'm in no hurry and it's more of a 'want' than a 'need'.
Like everything, there are 10 different ways of doing it.
Anyway, I was leaning towards Magneto, but I also need to develop a good chart for the Sharps, the problem with the Sharps and big cast bullets is I don't know the BC, but the bullet is big enough that I can get a reading at 100 yards (in theory). So with muzzle velocity + 100 yards velocity + bullet weight, that should be enough for BC and calculating drops.
Someone correct me if I am wrong, it is all about learning.