I think you are right. Slugs don't make much sense less than 75yds unless you live in an area with crazy winds always. Most guns I believe should shoot great at 50yds as well.
I understand people want to see 100yds but have to also realize it's one gun with one barrel with one guy shooting it at one setting. Every barrel will likely shoot differently. Even if he shot this gun out to 100yds and was just stacking them sub dime size groups doesn't mean if you buy the same model it'll do exactly that. Nor if it shoots terribly at 100yds doesn't mean that they all would or that it wasn't tuned to it's best for that projectile. I guess what I'm getting at is I would never see a review on a gun shooting at 50yds vs 100yds and think that review is trash. I've never bought a gun based on 100yd groups ever. I watch review to get the info on the gun, the technical specs or just it's features. Any accuracy groups while nice isn't guaranteed. Most high end gun companies like AGN Technology, Kalibrgun, Edgun, Taipan, AAA, FX, Daystate, Brocock etc have guns and barrels capable of great accuracy. It's just a matter of what that gun likes exactly projectile wise and tune wise.
He didn't have the opportunity to shoot it much or even try that many different projectiles through it which even at 50yds did very very well with slugs. That usually takes lots of tuning and trying quite a few different slugs to get them shooting good even at 50yds. So that to me was a good sign of very good potential.
