Federal makes them. I've found these to be a very accurate and inexpensive round. They are 38 grain hollow points. You definately need the hollow point when squirrel hunting. If you use solids, they will almost always make it back down thier burrow. The CCI's work well too but they have a harsher 'CRACK' on the ears.
I've had good luck with the 25 round clip, the only problem is the dang thing gets in the way when improvising a rest. I bought my first 25 round clip for $10 then the ban hit and they jumped up to $50 to $70 when you could find them. I bought up several when they jumped up to $12 just before the ban.
My wifes stainless 10/22 is stock except for the composite stock. I was going to customize it but it shot so well, I just left it alone. The trigger could use some help though.
I put a stainless, heavy .910 barrel with a match chamber, composite stock, custom hammer and a silver Luepold 2.5 X 8 vari X III with Butler Creek flip up scope covers on my stainless rifle. It's one of my favorites!
I've thought about a Timeny trigger group but the hammer was all it needed to lighten up the trigger and get rid of any creep.
I'm not familiar with the H&K but any one holer would have a space in my safe!