These are pics from my excursion the other day to the woodpile.
 
Seeking a good carry round if I pocketed my Beretta Bobcat 21A .22LR, I thought about some things.  I have resolved all stove-pipe issues so I may just grab this pistol if needed for a late night stroll.
 
I had been reading Sniper & Competition forums and there’s much talk about bullet weight, uniformity, brands etc.  What was conclusive, was that there are a few utilities that these folks use to accurize their rimfire ammo.
 
The items, do one or all of these: size the round uniformly (slug & case union), re-shape the bullet to a blunt, hollow point and other shapes, remove waxy buildup on the bullet / case neck area.
 
So, w/o purchasing anything yet, I decided to take my hottest loads out and “emery” 7 rounds as uniformly as possible. 
 
These are Aquila Super Maximums – 30 grain HP’s doing about 1800 fps, + or - 
 
When complete the top circumference of the shell case had a nice smooth rub mark and the slug had no bulky bulge there either.
 
I loaded the 7 re-finished rounds in my pistol and put 7 factory rounds in another magazine.
 
I fired at a light stainless container that we used to keep my daughter’s cat food in.  The distance measured approximately 20 – 25 feet.
 
I just rapid fired – looking down the barrel, not sighting carefully and hit 5 of 7 from the first magazine and 6 of 7 rds from the second magazine.

I forgot to put something in the pictures for scale, but I think you’ll get the idea.
 
The smaller entry and exit holes are from factory ammo and the larger from the sanded rounds.  The holes are easily the size of 9mm HP’s.

Perhaps this was due to the bullet design of the round in the first case and in the second, my sanding may have caused the larger holes to have come as a result of bullets that were beginning to tumble? 

Check out the pics below, very interesting!