Edited to change thread title. I realized it was a near duplicate of another thread.
I purchased a bullet sizer from D Rock over on Rimfire Central
and I've been working with the 60gr Aguila loads for a few days. I'm very happy with the results that I have been getting. Below are some pictures and info.
To use the tool place the cartridge in the base, which prevents the rim from getting crushed.
Then, place the adjusted hollow point tool in the upper portion of the tool and place the assembly on the base. I found that using the flat faced tool first helps to ensure that the hollow point tool is well centered on the bullet, as it isn't trying to center on the round nose.
Once assembled, give it a couple light raps with a mallet to drive the tool into the nose of the bullet.
The result is a bullet that has a hollow point and is shorter, which may help with stabilization.
Here is the result of some expansion tests. I tested them in plumber's putty, water, and on small game. They will expand and travel length-wise through a squirrel, head to tail.
For more aggressive expansion I found that driving the nose of a small phillips head screwdriver into the hollow point when it is still in the tool helps even more. Prestressing the bullet at four points causes it to expand very rapidly, but sometimes some of the four petals will break off.
Accuracy is the same for me, but I am using a Lilja 1:9 twist barrel on a 77/22, so I never had a problem with the accuracy of these rounds.