The story goes like this,... I decided to scope and zero the Marlin 60 I just won in the ARIZONASHOOTING.ORG raffle. I was very anxious to see if it would cycle some Aquila 60 grain sub-sonic ammo.
I had four types of 22lr on hand, just in case it wouldn't.I have had a cheapo BSA fixed 36X Platinum model scope for years, that I put on numerous rifles over the years, with good, consistent,tracking, accuracy/grouping,... every time. But, it just seemed to always have a short coming that resulted in its removal. So,in its box it has sat, with a half dozen others I became disillusioned with.
So, I get the 36x all mounted up, I go to my pistol range, at max distance of 33 yds., and try all four 22lr ammo types.
The super velocity/copper washed bullet, and the subsonic copper washed bullet had crap results for groupings. The regular hi velocity and subsonic, both bare lead bullets, both grouped one hole, with the Aquila 60 grain being the smaller of the two.
LIKE ALMOST .22" HOLE!!!
no matter how many shots taken!So,... happy, happy me,... the Model 60 cycles and groups fantastic and with subsonics!!!
Put the rifle up, just when a rouge rooster decided to cause havoc in the milking barn area with an old rooster I have had for many years. Time for the youngster to go! Thinking this would be a great challenge for my raffle rifle, I pull it out and go for it! Only to find, once a again, the short comings of a fixed 36X scope on moving targets at short distances.
Well, I decide to pull it off,... ONCE AGAIN,... and try some of the other scopes sitting on the shelf.
Well,... to make this long story not quite so long,
and finally get to my question ,... I tried three other scopes to find groups with all four 22 lr ammo types to have absolutely horrid groups! 
Sooo,... I get a wild hair across my butt and decide to throw the fixed 36X scope back on,... and, to my pleasant surprise,... MY ONE HOLE GROUPS COME BACK!!!
My question,... I have heard/read for a very long time that A BARREL can get picky about groupings when ammo isn't in sync with its harmonics, resulting in the need for hand loads, or a commercial ammo hunt for what it likes,... BUT,... I have never heard of a barrel liking a certain power, or a certain scope, to produce great groups!!
Anyone ever come across this? Could it be true, or, am I crazy?
I don't know!The one and only thing I do know about this experience, is, the fixed 36X power scope is the only one, out of four, that is producing one hole groups!
Sooo,.... what say ye,... fact?,..., or, mistaken conclusion?
, let's just say, he has learned his lesson.
