The trouble with the 22 Hornet in a magazine fed rifle is bullet seating depth for accuracy.
I worked with my Hornet (a Kimber M82) off and on for quite a while before I found the secret.
1. Fire form your cases. Hornet case dimensions are quite generous compared to the case. You won't get much accuracy until your case fits your chamber.
2. Disturb the fire formed case as little as possible. Use Lee Collet Dies, which put no stress on the case walls.
3. Size only the front half of the neck. With collet dies, which activate when the inner portion of the die contacts the shell holder, put a couple of washers on the shell holder to make it activate early. When you only size the front half of the neck, the rear half acts as a pilot, centering the case in the throat.
4. Use 35-grain Hornady V-Max bullets. You want to load so the beginning of the ogive is right up against the lede. The 35-grain V-Max has a very short nose, so you can load it well out and it will still feed through the magazine.
5. Use Hodgdon's Li'l Gun. Li'l Gun has a low but prolonged peak, giving high velocity with low pressures. A Hornady rep told me, "You can't get enough Li'l Gun into a Hornet case to blow it up."
6. I hold the case with a small pair of pliers and dip the powder from a butter dish -- fill the entire case. then tap it to settle the powder. I put the charged case in a loading block then check them all with a flashlight -- any case that has more or less powder than the others is dumped and re-charged.
Loaded like this, my Kimber gives 0.5" groups and beats 3,000 fps.
