For what its worth
I fire 3 shot grps to start the test of a new lot. If it looks good I will shot and score a ARA target.
If I like the lot I give sample to two friends, have them shot it. If their tests concur with my results
I order. At this point there may not be very much available. When...
40X rimfire
At our local club shoot some one is shooting a left hand 40X 22 rimfire, close examination looks to be a conversion (parts of scroll removed).
The party shooting it had to convert to left hand shooting because of accident to right eye.