What I can tell you is that the group was shot with a setup that I would never use for competition. It would never hold up for a 25 shots.
What does that mean?
It means that setups can often produce very small 5 shot groups and never shoot good BR cards because they will throw big flyers.
On the other hand, there are setups that will produce 5 shot groups 4 times or more larger, but never throw a flier. Those are the ones that win BR matches.
What do I mean by setup?
It’s the entire system. Slug, barrel, stock, velocity, strike, tuner position, rest supports, rest position, pressure, lube, etc, etc, etc.
Most people, after shooting a group like that, would assume it’s the best it’s ever going to get and blame the subsequent perpetual flyers on bad slugs or pellets.
Along the way to a great BR gun, there are many places that tease you with great, but fleeting, performance.
This was 38gr slugs at about 840fps, medium wind,
Singular 5 shot groups are absolutely meaningless for determining a rifles competition readiness.
Mike