Yup, same as those fellers..it can look real good at 50,,but 100 is just the beginning of proving their accurate.
I just joined a year membership at another club in town just so I could use the 200 range they have.
But, you'll know it's a poor load for the bullet if it won't group well at 50, I have seen some of my starting loads be that bad, they just needed a bit more umph' behind'm. I almost want to start higher than minimum charges with new bullets. But being a novice I think that's a bad idea, besides more loading = more experiance. My scopes shoot WAY low at 25 so I don't bother,
Once I find a charge that's grouping well I start messing with seating depth/COAL, then +/- a 10th or 2 grn weight. I'm learning it takes time to find THE load, but that's half the fun.
p.s. I haven't had to go to max yet to git good groups, I have seen groups open up after a certain point charge wise, and "good" has been in the mid-range of the book stats., Could be cause' I'm useing 22" Handi barrels