Lets talk guns!
If your rim fire does not have a match barrel and chamber, and you shoot in windy conditions, don't expect one hole groups.
You have to get the round counts up to really tell the difference between rimfire ammunition. At least for me, I am not a particular hard holder, nor am I consistent. Five shot groups are basically meaningless for consistency comparisons. The good stuff is more consistent. You pay for the Quality Control. Eley would not tell me what their sorting criteria at the end of the production line was, but Eley uses a dedicated production line for Red Box and Black Box. The best grouping stuff goes in the Red Box, and the not best grouping stuff goes in the Black Box. Both at the Eley and Lapua test ranges, your rifle gets tested with various lots, and you make the decision of what to buy based on 40 shot groups. It is real interesting to see the differences in group sizes at 50 and 100 meters. The best group at 50 meters is not necessarily the best group at 100 meter.
The lesser priced match ammunition does not cluster as tightly, and you can expect low velocity drop outs. Such as
An example of cheap match ammunition and good match ammunition.
Cheap match ammunition in an F Class rifle.
the shooter was disgusted with the sighter shot that fell 12 inches at 100 yards
He had enough of poor groups with cheap ammunition and purchased Eley Black Box. He is much happier now
Something that is true, for ultimate accuracy, you have to test different lots, and find the lot that shoots best in your rifle. The really good shooters talk to each other all the time about who is making good ammunition and if they find a great lot, they buy all they can. They of course, test, and then shoot the new stuff in club matches to see how it does. The really good stuff gets taken to the big matches.
The ex Club President, in his 70's, shot this group with some really old Match Ammunition.
and he used a M37 identical to this, prone, off a rest and bags, with the exception his rifle has an Eric Johnson barrel.