Raidman I have the CZ 527 Varmint in 204 also. I'm loading both the 32 grain Hornedy and the 40 grainer so they will just fit in the magazine and not having any accuracy problems. You can sure drive yourself nuts by trying to get to the rifling in magazine guns when trying to squeeze that last bit of accuracy out of them.
My gun is shooting five shot dime sized groups and probably would be doing better with someone whom could shoot better than I can. Here's an example of what I'm getting and I called the two fliers. This is the 32 grain Hornedy with a CCI bench rest primer and 26.6 grains of Allient 10X
This is five shots, one just went thru the same hole on the bottom. This is 40 grain Hornedy's with a CCI bench rest primer and 26.2 grains of Allient 10X
All these loads fit in the magazine and don't show any pressure signs on the case or the primer and bolt lift is smooth and easy.
Here's the little CZ that's been doing it. I got my loads off the Ruger 204 forum and worked up from 25.5 grains in .1 grain increments. I have to agree that my loads give better accuracy than the lighter loads.
