I agree, that was fine shooting.
Not sure if that was a 3 or 5 shot group you mentioned?
I too am in the "old man" status and appreciate small groups way out there, as you have.
For instance, at the Williamsport Heavy gun match last Sunday, I entered my new 6.5/284 16 1/2 Lb Light gun. I feel it has some serious potential or i wouldn't have put it in with the "big" guns.
We shoot 10 shots for record and you would be surprised what happens to groups after 5 shots, even to the 100 and 200 yard shooters. The groups usually triple in size all the time.
Anyway, the first five shots were in the center card (x ring) and measured 3". The wind switched and caught me on the next 5 shots and made my 10 shot group ended up as 11".
Had we shot 5 shots for record, that 3" would have been respectable but, far from a record which is a tad under 1 1/2" at 1000 yards.
Now this old guy is back at the loading bench working harder on his loading tecniques and hoping he can see the wind shift better the next time.
Keep up the good work, your doing great.